3 egg yolks, well beaten
1/4 c. lemon juice
Grated rind of 1 lemon
1/8 tsp. salt
1/2 c. plus 1 tbsp. granulated sugar

Combine the above ingredients. Cook until thickened, like custard. Cool slightly.

Fold in the following: 1 cup cream, whipped and 3 egg whites, stiffly beaten.

Line the bottom of an 8 x 10 inch pan with 3/4 cup crushed vanilla wafers. Pour in the filling. Sprinkle with more crumbs. Freeze.