This is a 9 inch open pie

Crumb Crust:
1 1/2 cups fine crumbs, (graham cracker, gingersnap, vanilla or chocolate wafers)
1/3 cup sugar
1/3 cup melted butter
Mix the crumbs, sugar and butter together in a bowl. Reserve 1/4 cup of the mixture for a topping. Press and pat the remaining mixture into the pie pan. Bake 8-10 minutes in a preheated 350 degree oven.

Filling:
3 eggs, separated
Grated rind and juice of 2 lemons
14 oz. can sweetened condensed milk
1/8 tsp. salt

Beat the egg yolks until they are thick and pale. Stir in the grated lemon rind, juice, milk and salt. Beat the egg whites until stiff but not dry and fold them into the yolk mixture. Pour into readied pan. Sprinkle the reserved crumbs on top and bake 40 minutes at 325 degrees.