Quarter tomatoes and place on an aluminum tray

Smoke tomatoes for 1.5 hours at 200°F with hickory bisquettes

Heat olive oil on low-medium heat in a medium sized saucepan

Add garlic and onion and sauté until translucent

Add smoked tomatoes to the saucepan and simmer on low heat for 1 hour, or until sufficiently reduced. Stir on a regular basis to keep sauce from sticking to the base of the pan

Add balsamic vinegar and salt & pepper to taste

I prefer my tomato sauce with more texture, but if you prefer a smoother sauce, puree the sauce in a blender or with a hand blender to desired texture