1/4 c. chopped onion
2 tbsp. butter
1 can (10 3/4 oz.) condensed Cheddar cheese soup
1/2 c. milk
1 c. cooked ham, 1 inch strips
1 1/2 c. cooked shell macaroni
1 1/2 c. cooked asparagus, 1 inch cuts
1/4 tsp. dry mustard
Generous dash black pepper

Cook onion in butter until tender. Stir in soup until smooth. Blend in milk. Add remaining ingredients. Pour into 1 quart casserole. Bake at 350 degrees for 30 minutes.