Sweet Potatoes Almondine

4 large sweet potatoes
4 tbsp butter or margarine
2/3 cup milk or soy milk
¼ tsp salt
½ cup brown sugar
 ¼ tsp pumpkin pie spice
½ cup slivered almonds
4 tbsp butter or margarine

Cook, peel, and mash sweet potatoes. Add 4 tbsp butter, milk and salt. Spoon into greased casserole dish.  Cream together brown sugar, pumpkin pie spice, almonds and 4 Tbsp butter. Spread over sweet potatoe mixture.  Bake at 350 until heated through and topping has melted