Meatball Shepherd's Pie
Notes: You can substitute ground turkey for the beef if you like. While you make the brown onion gravy, cook the potatoes: boil, bake, or microwave them. If you have cold leftover cooked potatoes, plain or mashed, reheat them in a microwave oven until steaming, then measure. You can make the gravy and assemble the pie through step 5 up to 1 day ahead; cover and chill. Uncover to continue; bake about 35 minutes if chilled.