Heat oven to 450 degrees hot. Split stalks from 1 (10 oz.) package frozen broccoli. Cook 3 minutes, drain. Place in 1 1/2 quart baking dish. Cover with 1 (7 oz.) can tuna, flaked. Mix 1 (10 1/2 oz.) can cream of mushroom soup and 1/2 soup can milk; pour over tuna. Sprinkle 1/2 cup crushed potato chips over top. Bake 15 minutes. 4 servings.