Sweet Potato Bake

In a large saucepan, cover the sweet potatoes with cold water. Bring to a boil over medium-high heat and cook until the sweet potatoes are tender and easy to pierce with a knife, about 30 minutes. Using tongs, remove the potatoes from the water and set aside to cool. When the potatoes are cool enough, peel them and mash them in a large bowl.Cut 1 stick of butter into equal pieces and place in a bowl with warm mashed potatoes. Add sugar, salt and vanilla extract and mix well. Beat the eggs and mix until the mixture is smooth. Add 1 tablespoon of milk. bake one at a time until the mixture is moist and no longer stiff (you may not use all the milk).Preheat the oven to 350 ° F and drizzle a 7-by-11-inch baking dish with non-stick spray. Place the sweet potato mixture in a baking dish and spread evenly. Melt the second portion of butter. In a large bowl, combine the nuts, flour, and brown sugar. Sprinkle the brown sugar mixture all over the potatoes and drizzle the melted butter on top.Bake until the filling is browned and crisp and the sweet potato mixture is cooked through, 35 to 40 minutes. Serve hot.