Pour the olive oil in a medium nonstick skillet on medium heat.
Ad onion, bell peppers, salt and pepper cook on medium heat for several minutes, stirring well.
Add the tomato sauce and 2 tablespoons of the fresh parsley.
Cover the skittle reducing the heat to low and simmer for 20 minutes
Add the rest of the parsley and the garlic and cook over low heat for 15 minutes, stirring every 5 minutes.
Add the vinegar and sugar increasing the heat to medium low. Cook uncovered for 5 more minutes.
Adjust the slat and pepper, either server right away or chill in the refrigerator.