Spray a medium saucepan or large non-stick skillet with cooking spray and place over medium-high heat; add onion and saute briefly; add garlic and saute until onion and garlic are golden brown.
Add tomato sauce and tomatoes; chop tomatoes, coarsely with a spatula; add vegetables; season with basil.
Heat until vegetables are cooked through; this soup may also be made in the microwave; serve with a good whole grain bread or crusty rolls