1 1/2 pounds tomatoes (about 3), seeded and cut into 1/2-inch pieces
1/2 cup Kalamata or other black olives, pitted
1/4 pound feta cheese, crumbled
3 tablespoons drained capers
3 tablespoons chopped flat-leaf parsley
1/4 teaspoon salt
1/4 teaspoon fresh-ground black pepper
3/4 pound spaghetti
6 tablespoons olive oil
3 cloves garlic, minced