Wash and cut the onion and bell pepper into small pieces
In a large pot over medium high heat, add the olive oil, once hot add the garlic, onion and bell pepper. Cook for 5 minutes until the vegetable have softened.
Add the remaining ingredients, reduce heat and simmer over low hest for 2 hours, give it a stir a few time.
Remove from heat, with the help of a hand mixer, blend the sauce until you obtain the texture of your choice.
Serve over pasta, garnish with fresh basil and parmesan if deisred,
Keeps for 4 days in the refrigerator, or 3 months in the freezer