Frozen lemon pie

Mix biscuit crumbs, melted butter and sugar together and press into 2 8" tins retaining 2 T of mixture. Separate eggs and beat whites till glossy, then in sugar till glossy,. Beat yolks till thick and fold in. Whip into crust and sprinkle with reserved crumbs. Freeze.

Source: Onslow College Cookbook, page 118