1 lb. beef liver, cut into 4 slices
1/2 tsp. salt
1/8 tsp. black pepper
1/4 c. butter
1 lg. onion, cut into thick slices (optional)
2 apples, peeled, cored, and cut into thick slices

Sprinkle liver with salt and pepper. Melt butter in large skillet. Cook liver slices in butter about 3 minutes each side. Remove; keep warm. Add onion and apple slices to skillet; cook, turning frequently, until onions are lightly browned. Serve over liver.