Peel and chop the garlic cloves and onion. Add extra virgin olive oil over medium heat in a pan. Add the garlic and onion, reduce the heat and fry until they brown
While the onion and garlic are cooking, dice the peppers, zucchini and eggplant
Add the diced vegetables to the pan and cook over low heat for 15 minutes. Stir occasionally
Wash and cut the tomatoes into halves. Put them in a processor with salt and pepper
Add the tomato sauce and sugar to reduce the acidity of the tomato into the pan. Stir well, cover the pan and simmer on low heat for an hour
Serve immediately