Grandma Estee'S Tuna Casserole - cooking recipe

Ingredients

1/4 c. chopped onion
1 Tbsp. margarine or butter
2 cans cream of mushroom soup
1/2 c. shredded processed cheese
1/8 tsp. dry mustard
1 (7 oz.) can tuna, drained and flaked
2 c. cooked macaroni
1/2 c. cooked peas
1/2 c. potato chips

Preparation

In saucepan, cook onion in butter until tender.
Blend in soup, cheese and seasoning.
Heat until cheese melts.
Combine with tuna, macaroni and peas.
Pour into 1 1/2-quart casserole dish.
Crumble potato chips on top.
Bake in moderate oven until nicely browned and bubbling.