Preheat your oven to 350°F.
Peel and dice sweet potatoes, then boil until tender.
Mash the sweet potatoes and mix with maple syrup and cinnamon.
Transfer the mixture to a baking dish and spread it evenly.
Prepare a pecan streusel topping with oats, pecans, and brown sugar.
Sprinkle the streusel over the sweet potato mixture.
Bake until golden and bubbling, about 25-30 minutes.
Serve as a delightful vegan side dish for your holiday meal.