Wash the tomatoes
Score a small X on the bottom of each tomato
Blanch the tomatoes in boiling water for 30 to 60 seconds
Transfer the tomatoes to ice water
Peel off the skins
Remove the cores
Chop the tomatoes
Heat olive oil in a pot
Add chopped onion and cook until soft
Add minced garlic and cook briefly
Add the chopped tomatoes
Add salt and black pepper
Add basil, oregano, or other herbs if desired
Simmer the sauce over low heat
Stir occasionally
Cook until thickened
Blend the sauce if a smoother texture is desired
Taste and adjust seasoning
Use immediately or cool and store