1 lb. boneless chicken
salt and pepper
3 tbsp. butter
1 small onion
1 c. sour cream
1 can cream of chicken soup
1 can cream of celery soup
1/2 c. sherry or white wine

Brown chicken in butter. Arrange chicken in casserole. Mix remaining ingredients and pour over chicken. Cover casserole.

Bake at 400°F for 1 hour.