2-4 whole chicken breasts, halved
Salt and pepper to taste
3 tbsp. butter
1 sm onion, sliced
1 c. sour cream
1 c. fresh mushrooms, sliced
1 (10 3/4 oz.) can cream of chicken soup
1/2 to 3/4 c. sherry cooking wine

Season breasts with salt and pepper. Melt butter in a skillet or frying pan; brown chicken on both sides. Arrange chicken, onion, and mushrooms in a casserole dish or baking pan.

Mix remaining ingredients together in a separate bowl; pour over chicken. Bake at 400 degrees for 50 minutes.