Editor's note: Serve this sauce with Michael Chiarello's Grilled Pasta with Grilled Meatballs .
Grilling the tomatoes and roasting the red pepper gives this sauce an underlying flavor that I really like. I tend to double this recipe and freeze what I don't need. I'm always glad to have this sauce on hand.
It's best to grill tomatoes over charcoal or a wood fire that's about 30 minutes past its hottest point. I like to use a plancha but you can use a cast-iron pan or grill the tomatoes directly on the grill rack.