Place the onion chunks and garlic into a food processor and pulse until finely chopped. Remove and set aside.
Add the carrots, zucchini and red bell pepper to the food processor and pulse until chopped into small pieces.
Heat 1 tablespoon of oil in a large pot over medium heat, add the onions and garlic and sauté for 3 minutes.
Add the vegetable mixture and cook for an additional 3 minutes.
Mix in the dried thyme, bay leaf, and salt.
Add the tomato paste and stir to combine until all of the ingredients are coated.
Add the remaining ingredients, stir, simmer, cover and cook for 30 minutes, stirring occasionally.
Toss with pasta or serve over rice or chicken.