Cover bottom of cooking pan lightly with olive oil and heat to medium.
Mince garlic, dice onion and peppers and place in pan.
Sauté until onion becomes translucent.
Add tomatoes, tomato sauce and brown sugar. Stir well.
Reduce heat to low and cover, for about 10 minutes, stirring occasionally.
Remove lid and mash tomatoes with a ricer. Stir and simmer for another 10 minutes.
Remove from heat and serve.
Serve over spaghetti squash or pasta alone or add shrimp, baked chicken, or Italian sausage (including plant-based proteins). Pairs well with side salads and garlic bread. Excellent topped with a fried egg (or two).