1 can (10 3/4 oz.) condensed cream of mushroom soup
1/3 c. milk
1 c. cut up cooked chicken or turkey
1 can (16 oz.) cut green beans, drained
4 eggs, separated
1/4 c. shredded process American cheese

Heat oven to 375 degrees. Mix soup, milk, chicken and beans in ungreased 1 1/2 quart casserole. Cook uncovered 10 minutes. Beat egg yolks until thick and lemon colored, about 5 minutes. Stir in cheese. Beat egg whites until stiff; fold in cheese mixture. Spoon onto hot chicken mixture. Cook uncovered until topping is puffy and golden, about 35 minutes.