A slightly sweet tomato sauce suitable for homemade pizza and pasta recipes.
Using a food processor, puree the tomatoes till slightly chunky, but not completely smooth. Set tomatoes aside.
In a medium saucepan, melt butter in oil over medium-low heat until combined. Add the spices: garlic, pepper flakes, oregano, basil and pinch of salt. Continue to cook for another 5 minutes. Stir frequently.
Discard onions and adjust for salt. Cool and refrigerate in Tupperware for up to 2 weeks.