Tuna Italiano 1/2 cup chopped onion 2 tablespoons butter 1/4 teaspoon oregano, crushed 1 can cream of mushroom soup 2 cups cooked elbow macaroni 1/2 cup chopped canned tomatoes 1 large can tuna, drained and flaked Sauté onion in butter with oregano until tender. Blend in soup; add remaining ingredients. Heat, stirring occasionally. Serve with grated Parmesan cheese.