Move oven rack to middle position and heat oven to 325°F. Drizzle 2 tablespoon of the olive oil into a 9x13" baking dish. Spread half of the garlic in the baking pan. Arrange tomato slices in the baking pan. Spread the remaining garlic over the tomatoes and season with a little salt and pepper. Drizzle the remaining olive oil over tomatoes and garlic. Bake for about an hour and a half until tomatoes are shriveled and beginning to turn black at the edges. Remove from oven and cool.

Remove tomatoes from pan to a cutting board using a slotted spoon or turner, leaving the oil in the pan. Discard excess oil. Chop tomatoes and garlic and move to a medium bowl. Stir in red onion, jalapeno, cilantro and lime juice. Season with additional salt and pepper, and lime juice to taste. Serve immediately or refrigerate, covered until read to use.