Make ahead: The pie can be baked 1 day in advance; cover and refrigerate. Storage: Keep leftovers covered and chilled for up to 4 days. Freeze slices well wrapped for up to 1 month; thaw in the refrigerator. Crust tips: For a crisper bottom, preheat a baking sheet and bake on the lower rack. If using a shallow standard crust rather than deep-dish, you may have a few tablespoons of extra filling. Spice swap: You can replace the individual spices with 1 3/4 tsp pumpkin pie spice. Doneness: Pull the pie while the center still jiggles slightly; overbaking can cause cracks.