Square pan, 8 x 8 inches
1 (6 oz.) can tuna, drained
1 (6.5-7 oz.) pkg. potato chips
1 can cream of mushroom soup
1/2-3/4 can (soup can) milk

Spread tuna on bottom of pan. Crush potato chips and pour over tuna. Spread soup (out of can) on top of chips. Make slits with knife through all ingredients and pour milk over. Bake at 350 degrees until brown, approximately 30 minutes. Cool slightly. Cut into squares and serve.