Here is a recipe from Rick Bayless:
Serves 6 generously
6 garlic cloves, unpeeled
1 small white onion, sliced 1/4-inch thick
6 ounces (1 medium-small or 2 to 3 plum) ripe tomatoes
3/4 teaspoon black pepper, preferably freshly ground
1/8 teaspoon cloves, preferably freshly ground
2 tablespoons...