1 tbsp. chopped onion
1 tsp. butter
1 can mushroom soup
2 c. cooked noodles
1/3 c. milk
1 (7 oz.) can tuna
3/4 c. bread crumbs

Cook onion in butter until soft. Stir in soup and milk. Break tuna into chunks, mix lightly with soup mixture and noodles. Place in greased 1/2 quart casserole; top with dry bread crumbs. Bake at 350 degrees for 20-25 minutes.