Preheat your oven to 450F. Using a fork, pierce the sweet potatoes about 4 times. Bake approximately 1 hour or until they are tender.
Roast the bananas, with the peels on, for the last 15 minutes of cooking time.
Allow them to cool, but not completely - just enough so that they are easy to handle. Peel the bananas and the sweet potatoes and transfer to a food processor. Pulse until the potatoes are nice and chunky.
Add the butter and grade B maple syrup; puree until smooth.
Add the cinnamon, pumpkin pie spice and salt; puree to combine. Transfer to a shallow baking pan and smooth out the surface.
In a skillet melt the butter over low heat and toast walnuts and banana chips and sprinkle with salt.
Sauté until walnuts and banana chips are well-coated and walnuts are slightly toasted, about 5 minutes.
Arrange the walnuts and banana chips on top of puree and sprinkle with brown sugar. Bake at 325F until heated through, about 15 minutes.
Submitted by:
Anne Thornton, Host of Food Network's Dessert First with Anne Thornton