Sift 3/4 cup sugar. Beat until very light 5 egg yolks. Add the sugar gradually. Beat constantly until eggs are creamy. Add:

1 tsp. grated lemon rind
4 tbsp. lemon juice

Whip until stiff:

5 egg whites
1/8 tsp. salt

Fold them lightly into the yolk mixture. Place the souffle in a 9 inch baking dish. Set it in a pan of hot water. Bake it in a moderate oven, 325 degrees for about 50 minutes or until it is firm. Serve at once.