Kahlua Cheesecake Surprise

Ingredients:
Zwieback Crust (recipe below)
2 envelopes unflavored gelatin
1/2 cup Kahlua
1/2 cup water
3 eggs separated
1/4 cup sugar
1/8 tsp salt
2 (8 oz.) packages cream cheese
1 cup whipping cream
Shaved or curled semi-sweet chocolate

Ingredients:
Prepare Zwieback Crust. In top of double boiler, soften gelatin in
Kahlua and water. Beat in egg yolks, sugar and salt. Cook over boiling water stirring constantly, until slightly thickened. Beat cheese until fluffy. Gradually beat in Kahlua mixture; cool. Beat egg whites until stiff but not dry. Beat cream stiff. Fold egg whites and cream into
cheese mixture. Pour into prepared pan. Chill 4 to 5 hours, or overnight. Remove from refrigerator 15 minutes before serving. 
Decorate with shaved or curled chocolate. Makes 12 servings. (To add flavor, spoon a little Kahlua over each serving). 

Zwieback Crust: 
Blend 1 1/2 cups fine Zwieback crumbs, and 1/3 cup each sugar and melted butter together. Press firmly over bottom and halfway up sides of a 9-inch spring form pan. Bake in a moderate oven (350 degrees F.) 8 to 10 minutes. Cool.