- 2 (28oz) cans whole plum tomatoes (try to use best quality, if you can)
- 7 Tbsp butter
- 1 medium sweet onion, peeled & halved
- Add tomatoes and their juices to a large saucepan. Add butter and onion. Cover and bring up to a simmer. Simmer over medium-low heat about 45-50 minutes, stirring often. Break up tomatoes with your spoon as you stir.
- When ready to serve, remove onion and discard (or, you can mash it up and stir it back into the sauce if you like). Serve over pasta.
*Gluten free notes: this is a gluten free sauce. Feel free to serve it over gluten free pasta!