Onions occupy center stage in this dish, and their sweetness is balanced by the apples and other ingredients to create a very flavorful yet digestible side to poultry, beef, and pork. Add a salad of tossed greens and mandarin oranges, sliced Emmentaler cheese, and a medium-dry red table wine for a simple, satisfying, and comforting supper with friends. The ingredients can be assembled a day in advance, allowing you to stuff and bake onions along with the rest of dinner.