On medium heat, in large saute pan add 4 tbsp olive oil, onion and garlic. Saute until onion is tender
Add tomatoes or tomato sauce, sugar, oregano, basil, salt, black pepper, bay leaf and red pepper flakes. Bring to a simmer.
Simmer on low until desired thickness about 45 minutes. Stir in additional 4 tablespoons olive oil. Serve over hot pasta of choice.