4 lg. yams or sweet potatoes
1/4 c. butter
2 well beaten eggs
1/3 c. sugar
2 tsp. baking powder
1 tsp. salt (optional)

Pare potatoes and boil until tender. Mash and add remaining ingredients. Beat well and transfer to buttered casserole. Dot with additional butter and bake in moderate oven (350 degrees F.) until brown, 30 to 40 minutes. Serves 6-8.