Flip a coin but then ask two friends: Shepherd’s Pie or Moussaka?
Sandwich the cinnamon- and allspice-laced leftover leg of lamb ragu between layers of eggplant cutlets and boiled potato slices, then top with a nutmeggy béchamel and grated cheese. Bake about 45 minutes. Rest 15 minutes before serving with a simple lettuce salad. Watch Doctor Who or listen to music.
Remember all the while it’s even better the next day. Freeze the second one for an emergency dinner.