Preheat oven to 425ºF.
Place a large skillet over medium-high heat with 2 turns of the pan of EVOO, about 2 tablespoons. Add the onion, garlic and roasted peppers to the pan and cook until the onions begin to get tender, 4-5 minutes.
Set up a food processor or blender and add the contents of the pan to the machine. Add in the tomato sauce and puree everything up (it should be about the consistency of thin tomato sauce). Season with salt and pepper and pour it out into the bottom of a casserole dish or sauté pan.
Swirl your dish around so that the bottom is evenly coated with sauce then arrange your veggies on top in a spiral pattern, alternating each veggie type, until you've filled the pan (like he did in the movie!).