Preheat the oven to 425
Clean all veggies and cut them into the sizes called for in the ingredient list. You don’t have to worry too much about the size because you will be chopping them anyway. It is mostly designed so they will cook at roughly the same time.
Toss with 2 teaspoons Italian herbs, salt and pepper, and 1/3 cup extra virgin olive oil, to lightly coat all of the veggies before baking.
Prepare a large baking sheet with cooking spray.
Spread veggies out onto the prepared baking sheet in a single layer. If you find that you have too many veggies for your tray, don’t worry just use a second tray! Roast the vegetables for 30-40 minutes, or until tender and beginning to brown a little on the edges.
Turn them with a spatula about halfway through. At this time, you will probably discover that the tomatoes cook faster than everything else. If so, remove them and set them aside while the rest of the veggies continue to cook.
Once veggies are all cooked, remove them from the oven, cool to room temperature, and coarsely chop veggies together.This step can be made a day or two ahead of time and refrigerated in an airtight container.