2 onions, chopped
5 T. butter
3 apples, peeled, cored and sliced
2 lbs. boneless, skinless chicken breasts
1 t. salt
1/2 t. pepper
1-1/4 c. shredded sharp Cheddar or Swiss cheese
1/2 c. grated Parmesan cheese
1/2 c. dry bread crumbs
2 T. applejack or apple cider