Slice baking potatoes in quarter inch slices that do not go all the way through to the bottom. Place in foil. Stuff the potato with small slices of onions in each cut (or half slices of larger onions). Salt and pepper, and top with melted butter. Wrap potato completely in foil, so it doesn’t leak, and bake in oven for 40 min at 350°. Can cook with other items in oven; adjust cooking time to temp.