Storage: Refrigerate in an airtight container up to 4 days. Reheat in the microwave for 30–60 seconds or warm in a 300°F oven until heated through. Freezing: Wrap slices well and freeze up to 3 months; thaw overnight in the fridge. Variations: Swap ham for bacon, sausage, or turkey, or go meatless and add mushrooms, bell peppers, or tomatoes. If you don’t have an oven-safe skillet, cook the fillings on the stove, then pour into a greased baking dish to finish in the oven.