Baked Mashed Sweet Potatoes With Marshmallows
["3 c. sweet potatoes, cooked in jackets and peeled", "1/2 c. half and half", "1/4 c. firmly packed light brown sugar", "2 Tbsp. melted butter", "1/2 tsp. salt", "2 eggs, separated", "1/2 tsp. nutmeg", "1 tsp. vanilla", "20 regular size marshmallows"]
["Preheat oven to 325\u00b0.", "In small saucepan, heat half and half, sugar, butter and salt over low heat; stir until butter has melted.", "Beat egg yolks in a medium size bowl.", "Gradually beat in half and half mixture.", "Beat yolk mixture into potatoes.", "Beat egg whites and fold in.", "Put in 1 1/2-quart casserole and top with marshmallows."]
["sweet potatoes", "brown sugar", "butter", "salt", "eggs", "nutmeg", "vanilla", "regular"]