1/2 (1 lb.) pkg. Creamettes elbow macaroni
1 can condensed Cheddar cheese soup
1 1/4 c. milk
1/2 tsp. ground mustard
1/2 tsp. seasoned salt
1/2 tsp. black pepper
1 c. shredded Swiss cheese
1 can Starkist white tuna in water, drained and flaked
1 can Durkees French fried onions
1 c. chopped celery
1 tbsp. chopped pimento (optional)

Prepare elbow macaroni according to package instructions; drain. Combine soup, milk, seasonings, 1/2 cup Swiss cheese, tuna, 1 cup French fried onions, celery, and pimento. Stir in macaroni; mix well. Pour into a 2 quart baking dish. Bake, covered, in a 350 degree oven for 25 minutes or until heated through. Top with remaining cheese and onions; bake, uncovered, 5 minutes or until onions are golden brown.