2 tablespoons chopped onion1 clove garlic, finely chopped1 tablespoon vegetable oil1 jar (15½ ounces) spaghetti sauce1 can (9½ ounces) tuna, drained¼ teaspoon dried oregano leaves2 quarts water1 tablespoon vegetable oil1 teaspoon salt7 ounces uncooked vermicelli½ cup sliced pimiento-stuffed olivesGrated Parmesan cheese (optional) Cook and stir onion and garlic in 1 tablepoon oil in 10-inch skillet […]