Grilled Tuna with Mediterranean Sauce

3 tomatoes , peeled, seeded and chopped (1 1/2 lbs) 1/2 cup extra virgin olive oil 3 tablespoons lemon juice 3 garlic cloves , minced 3/4 teaspoon salt 1/2[...]

4 (4 ounce) tuna steaks (center cut) 2 tablespoons olive oil salt freshly ground pepper , to taste 1/4 teaspoon hot red pepper flakes 4 sprigs fresh thyme ,[...]