Sweet Potato Souffle
["3 c. mashed sweet potatoes", "1 c. sugar", "1/2 tsp. salt", "2 eggs", "1/3 stick margarine", "1/2 c. sweet milk", "1 tsp. vanilla", "1 c. brown sugar", "1/3 c. flour", "1 c. chopped nuts", "1/3 stick margarine"]
["Bake at 350\u00b0 for 35 minutes."]
["mashed sweet potatoes", "sugar", "salt", "eggs", "margarine", "sweet milk", "vanilla", "brown sugar", "flour", "nuts", "margarine"]