1 can cream of mushroom soup
grated sharp cheddar cheese
1 bag Pepperidge Farm stuffing crumbs
Slice onions into casserole to make a layer. Partially separate rings. Top with 1/2 can mushroom soup. Cover with grated cheese. Repeat layers. Top with Pepperidge Farm stuffing. Dot top with butter. Bake at 350 for 25 to 30 minutes.