Tuna Delight - cooking recipe

Ingredients

1 (7 1/4 ounce) box macaroni and cheese mix
1/4 cup butter or 1/4 cup margarine
1/4 cup milk
1 (10 3/4 ounce) can cream of mushroom soup
1/2 teaspoon garlic salt
1 small onion
1 (4 ounce) can sliced mushrooms
3/4 cup chopped celery
1 (7 ounce) can canned tuna

Preparation

Preheat oven to 350\u00b0F.
Prepare macaroni and cheese as directed on box.
Pour into a greased 2 quart casserole and blend in cream of mushroom soup, garlic salt, onion, can of mushrooms, chopped celery and tuna.
Mix.
Cover and bake for 25 minutes or until thoroughly heated.