Storage: Store covered at room temperature for up to 3 days, or refrigerate for up to 5 days. Warm slices slightly before serving for best texture.
Substitutions: You can use walnuts, pecans, or almonds for the nuts. Greek yogurt can replace sour cream for a tangier flavor.
Variations: Add a teaspoon of nutmeg to the topping for extra spice, or drizzle with caramel sauce before serving.