4 to 5 medium sweet potatoes
1/2 to 3/4 c. sugar
1/3 c. butter
1 beaten egg yolk
1 tsp. vanilla flavoring

Peel and slice sweet potatoes. Cook until done in about 1/2 cup of water (about 20 minutes or more). Drain. Cream potatoes with mixer, adding sugar and butter. Separate an egg and use the beaten yolk of egg in cream mixture. Beat well. Add vanilla flavoring. Place in greased baking dish.

Meringue:

1 egg white, beaten
2 tbsp. sugar
2 or 3 drops vanilla flavoring

To egg white, add sugar and vanilla flavoring. Beat until sugar dissolves. Spread over cream mixture.

Bake at 375°F until brown, about 15 to 20 minutes.