Grandma Welch'S Sweet Potato Pone
["2 c. grated raw sweet potato", "1/4 c. melted butter", "1/2 c. brown sugar", "2 eggs", "2 Tbsp. lemon juice", "1/2 tsp. cinnamon", "1/4 tsp. nutmeg", "1/4 tsp. salt", "1/2 tsp. vanilla"]
["Separate egg yolks and whites.", "Mix all ingredients except egg whites.", "Beat whites until stiff and fold in potato mixture.", "Bake in a buttered dish for about 45 minutes at 350\u00b0 or until firm."]
["sweet potato", "butter", "brown sugar", "eggs", "lemon juice", "cinnamon", "nutmeg", "salt", "vanilla"]