Wash the tomatoes
Remove the cores
Score the bottoms with a small X
Blanch the tomatoes in boiling water for 30 to 60 seconds
Transfer the tomatoes to ice water
Peel off the skins
Chop the tomatoes
Heat olive oil in a pan
Add chopped onion and cook until soft
Add minced garlic and cook briefly
Add the chopped tomatoes
Add salt and black pepper
Add sugar if needed
Simmer until thickened
Stir in fresh basil or other herbs
Adjust seasoning to taste
Blend if a smoother sauce is desired
Serve or store the sauce