Fresh tomatoes and tomato paste combine to make an ultra-tomato-flavored marinade. It’s great on shrimp, fish and pork. Slideshow: More Marinade Recipes
Working over a medium bowl, grate the tomatoes on a box grater until only the skins are left in your hand; discard the skins. Whisk in the olive oil, tomato paste, fennel, pepper and garlic.
I think it will be excellent as a dipping sauce as well