1 (11 ounce) can condensed Cheddar cheese soup
1 cup milk
1/2 teaspoon dry mustard
1/4 teaspoon salt
1/4 teaspoon pepper
1/2 cup Swiss cheese, divided
1/2 cup Cheddar cheese, divided
1/2 grated Parmesan cheese, divided
1 (28 ounce) can Durkee French fried onions, divided
Preheat oven to 350 degrees. In 1-1/2 quart casserole, combine hot macaroni, soup, milk, seasons, 1/4 cup each of Swiss, Cheddar and Parmesan cheeses and 1/2 can Durkee onions.
Cover and bake at 350 degrees for 25 minutes or until heated through. Top with remaining cheeses and onions. Uncovered and bake 5 minutes or until onions are golden brown.
Makes 6 to 8 servings.