You can make the streusel topping up to a week ahead of time. Store in an airtight container in the freThe sweet potatoes can have their first bake a day ahead. Store in an airtight container in the refrigerator. Continue the recipe the next day and add an additional 3 - 4 minutes to the baking time. Variations: You can add other spices to the sweet potatoes and streusel. We recommend adding ¼ teaspoon of spices such as nutmeg, cloves, ginger, and/or cardamom.