Tuna Fish Casserole - cooking recipe

Ingredients

1/4 c. chopped onion
1 Tbsp. butter
1 can cream of mushroom soup
1/2 c. milk
1/2 c. shredded cheese
1/2 tsp. dry mustard
1 can drained tuna
2 c. cooked macaroni
1/2 c. peas
1/2 c. potato chips

Preparation

In saucepan, cook onion in butter until tender.
Blend in soup, milk, cheese and seasonings.
Heat until cheese melts.
Combine with tuna, macaroni and peas.
Pour into a 1 1/2-quart casserole. Crumble potato chips on top.
Bake at 350\u00b0 for 30 minutes.