Roast a pan of vegetables with good olive oil, blend with broth, and dinner is very close to done. That’s the idea behind sheet pan roasted vegetable soup, and it’s exactly the kind of cooking I want when fall gets busy. The oven does most of the work, the ingredients are flexible, and there’s something warm to put on the table with sandwiches or bread for dipping.

Tonight, I’m making our Rosemary Tomato Apple Soup for the Fort Collins Foodie Walk. It has roasted tomatoes, garlic, rosemary, and our beloved Honeycrisp apples. Around here, that feels like a pretty good way to welcome a crisp mid-October eveningm, whether it was planned or not! 

How We Ended Up with Soup for October’s Foodie Walk

Last October, every one of us Foodie Walk businesses did something pumpkin. Apparently, we were all having the same thought. So this year, I got my pumpkin moment in early with our Feta Pumpkin Dip with Basil Olive Oil in September. That opened up October for something different: a nice roasted vegetable soup, just as the weather starts feeling like soup weather here in Fort Collins.

Tomatoes and apples might not be the first combination you think of, but they make sense together. The apple brings a little sweetness to the tomatoes, while the rosemary keeps everything savory. It tastes like fall without requiring another spoonful of pumpkin.

At home, these are also the soups that practically invite a sandwich into the bowl. Dipping bread or sandwiches into soup is one of my kids’ favorite things to do. Give them something warm and something to dunk, and we’re off to a good start.

What Is Sheet Pan Roasted Vegetable Soup?

Sheet pan roasted vegetable soup is made by roasting vegetables on a rimmed baking sheet, then blending them with broth until smooth. Olive oil coats the vegetables during roasting and adds flavor to the finished soup. Onion, garlic, herbs, and a little balsamic vinegar can help bring everything together. The sheet pan handles the roasting. A blender or immersion blender handles the texture. You may still use a saucepan to warm the finished soup, but you don’t need to build the whole meal through a long series of stovetop steps.

Roasting also gives you something different from simply simmering vegetables in broth. You get browned edges, softened garlic, and a deeper roasted flavor before the soup ever reaches the blender.

Our Fall Starting Point: Rosemary Tomato Apple Soup

Our Rosemary Tomato Apple Soup uses Rosemary Fused Olive Oil and Gravenstein Apple White Balsamic Vinegar alongside tomatoes, garlic, red onion, Honeycrisp apple, and fresh rosemary. The rosemary oil carries that savory herb flavor through the soup. The apple balsamic adds a little brightness alongside the fruit. Broth brings everything to a spoonable consistency, and a small amount of cream rounds it out.

If you’re making the soup we’re serving at the Foodie Walk, use the full Rosemary Tomato Apple Soup recipe for the ingredient quantities and instructions. The method below is a flexible starting point for creating other roasted vegetable soups with what you have.

How to Make Roasted Vegetable Soup on One Sheet Pan

Start with Vegetables That Will Fit in One Layer

For a flexible batch serving roughly four people, start with about 2 pounds of prepared vegetables, including your onion. Add a few garlic cloves if you like, about 2 tablespoons of olive oil, and salt and pepper. Have 2 to 4 cups of broth ready for blending; you may not need all of it. A large rimmed sheet pan, approximately 13 by 18 inches, is a useful size. The vegetables should fit in a mostly single layer with some breathing room. If they’re piled on top of each other, save some for another batch or use a second pan. A crowded tray tends to steam more than roast. Cut firm vegetables such as carrots and squash smaller than softer ingredients such as tomatoes or peppers. Everything needs to become tender enough to blend, so the size of the pieces matters.

Roast Until Tender, with Some Browning

Heat the oven to 400°F. Toss the vegetables with enough olive oil to lightly coat them, season, and spread them across the pan. Begin checking around 25 minutes. Many combinations take about 30 to 45 minutes, while dense vegetables may take longer. Stir or turn pieces as needed, and remove anything that finishes early. Look for vegetables that are easy to pierce with a fork and have some browned edges. You don’t need every piece to look alike, and you don’t need blackened vegetables to get good flavor.

For loose garlic cloves, leave the skins on during roasting and squeeze out the softened garlic before blending. Remove woody herb stems, pepper stems, and any other inedible parts.

Blend with Broth a Little at a Time

Keep the flavorful pan juices and scrape up the browned bits that release easily. Leave behind anything burnt. For a countertop blender, let the ingredients cool as required by your blender’s instructions. Only blend warm or hot ingredients in a container approved for that use, following its fill limits and venting instructions. Never blend hot soup in a sealed personal blender cup.

Start with about 2 cups of broth and add more gradually until the soup reaches the thickness you want. Blend in batches if needed. You can also transfer the roasted vegetables and broth to a saucepan and use an immersion blender.

Warm, Taste, and Finish

Warm the blended soup in a saucepan and taste before adding anything else. Broth varies in saltiness, and roasting changes the flavor of the vegetables. If the soup is too thick, add a little more broth. If it tastes flat, it may need salt or a small splash of balsamic vinegar. If it needs richness, try a little cream or a finishing drizzle of olive oil. Add one thing at a time and taste again. It’s much easier to add another teaspoon than to undo a generous pour.

Four More Roasted Vegetable Soup Combinations to Try

These are starting combinations for the flexible method above. Keep the total amount of vegetables close to 2 pounds, including the onion, and adjust the broth after blending.

Butternut Squash, Carrot, and Onion

Use peeled, seeded butternut squash with carrots and onion. Cut the squash and carrots into small pieces so they soften fully. Our Wild Mushroom & Sage Infused Olive Oil is a lovely choice here. The earthy, savory flavor balances the sweetness of the roasted vegetables. Blend with vegetable broth and finish with a little cream if you want it. I’d keep this one fairly thick for bread dipping.

Cauliflower, Garlic, and Onion

Roast cauliflower florets with onion and garlic using our Garlic Infused Olive Oil. Blend with vegetable broth, then decide whether it needs anything more. Cauliflower can make a pleasantly creamy soup without dairy, particularly when it’s completely tender before blending. For more ways to use the same bottle, our Garlic Infused Olive Oil cooking guide has plenty of ideas for the rest of the week.

Tomato, Red Pepper, and Onion

Try tomatoes, seeded red bell peppers, onion, and Garlic Infused Olive Oil. Roast until the vegetables soften and pick up some color, then blend with enough broth to bring everything together. For an especially smooth soup, peel away any tough, loose pepper skins after roasting. You can also strain the blended soup if the skins bother you. This is an easy direction to take when grilled cheese is already on the dinner plan.

Carrot, Apple, and Onion

Use mostly carrots, with onion and a smaller amount of cored apple. Cut the carrots into thin pieces so they soften before the apple becomes overly browned. Rosemary Fused Olive Oil gives this combination a savory backbone. After blending with vegetable broth, taste before adding a small splash of Gravenstein Apple White Balsamic. Start with a teaspoon for the batch and work up from there. You want a vegetable soup with a little apple sweetness, so let the carrots do most of the work.

Which Olive Oil Is Best for Roasted Vegetable Soup?

Choose an olive oil that suits the vegetables and the flavor you want in the bowl. Rosemary Fused Olive Oil works beautifully with tomato and apple, carrots, and other fall vegetables. Garlic Infused Olive Oil is an easy everyday choice for cauliflower, tomato, red pepper, and mixed vegetable soups. Wild Mushroom & Sage Infused Olive Oil adds an earthy note to squash and other savory combinations. Use the oil to coat the vegetables before roasting, then taste the finished soup before deciding whether to add a drizzle to each bowl. That last little bit can carry the aroma right up to the spoon.

If you’re choosing a bottle in person, come taste with us at Rocky Mountain Olive Oil in Fort Collins or Estes Park. Tell us what you’re cooking, and we can help you find a flavor you’ll actually use.

What to Serve with Roasted Vegetable Soup

In our house, the dipping situation deserves some consideration. Grilled cheese, toasted bread, and a warm sandwich all make sense next to a smooth vegetable soup. Leave the soup a little thicker if dipping is the main event. For a soup you want to sip from a mug, add more broth. For my own bowl, the bread needs to be gluten-free. Check your broth and other packaged ingredients too if you’re cooking gluten-free, and use separate preparation surfaces and utensils when needed.

You can also make the meal more filling by blending in some drained, rinsed white beans or adding them to the finished soup. Add extra broth as needed because beans will thicken the mixture.
And if you want bread with a little more flavor, brush it with Garlic Infused Olive Oil before toasting. No elaborate side dish required.

How to Freeze Roasted Vegetable Soup

Smooth roasted vegetable soups are useful freezer meals because you can portion them for lunch, dinner, or a small bowl alongside a sandwich. Divide the finished soup into shallow containers and refrigerate promptly, within two hours of cooking. Don’t leave a large pot sitting out until it reaches room temperature. Once chilled, transfer it to freezer-safe containers or bags if needed. Leave expansion space, label with the soup name and date, and freeze in portions you’ll realistically use. Flat freezer bags save space; sturdy containers are handy when you want an individual lunch.

For these soups, I’d aim to use frozen portions within about three months for good quality. If you’re planning ahead, freezing the soup before adding cream gives you more flexibility with the texture when reheating.
Thaw overnight in the refrigerator, then reheat in a saucepan, stirring and adding a splash of broth as needed. Reheat leftovers to 165°F. Keep refrigerated leftovers for three to four days.

A small container of soup may not look like much when it goes into the freezer. On a busy evening, it starts looking a lot more useful.

Common Questions About Sheet Pan Vegetable Soup

Can You Make Roasted Vegetable Soup Without Cream?

Yes. Fully softened vegetables blended with broth and olive oil can make a smooth soup without cream. Cauliflower, squash, and cooked white beans are useful when you want more body. Use vegetable broth and skip dairy additions for a vegan version.

Do You Need a High-Powered Blender?

No. A high-powered blender can produce a finer texture, but an immersion blender or standard countertop blender can also work. Roast the vegetables until thoroughly tender, add enough liquid for the blades to move freely, and follow your blender’s instructions.

Why Is My Roasted Vegetable Soup Grainy?

The vegetables may need more cooking, the soup may need more liquid, or it may need additional blending. Woody herb stems and tough skins can also affect the texture. Remove inedible parts before blending, and strain the soup if you prefer a finer finish.

Can You Add Balsamic Vinegar to Soup?

Yes. Balsamic vinegar can help balance a sweet or rich vegetable soup. Our Rosemary Tomato Apple Soup includes Gravenstein Apple White Balsamic in the recipe. When experimenting with another soup, add a small amount after blending and taste before adding more.

Can You Double a Sheet Pan Soup?

Yes, but use two pans so the vegetables have room to roast. Rotate the pans as needed and check each one for tenderness. Blend in batches rather than trying to fit everything into one blender pitcher.

A Fall Dinner Worth Making Again

Tonight, this soup is headed to the Fort Collins Foodie Walk. At home, the same idea works for a weeknight dinner: vegetables in the oven, broth ready for blending, and something good for dipping. Start with our Rosemary Tomato Apple Soup, or use the method to work through the vegetables already in your kitchen. Make enough to tuck a little away for later if you can. And don’t worry about making every bowl look perfect. Around here, someone is probably going to dunk a sandwich into it anyway.

xoxo,

Andi