Toss cauliflower and onion in Cilantro & Roasted Onion Oil and season with salt and pepper. Roast on a baking sheet at 425 degrees for 25 mins, stirring occasionally.
Turn oven down to 375 degrees.
Combine cauliflower and onion mix with all other ingredients and pulse in food processor until mixed but slightly chunky.
Place mixture in a baking dish, sprinkle with extra mozzarella cheese and bake at 375 degrees for 20 mins.