1 ¾ cup finely crushed graham crackers ¼ cup finely chopped walnuts ½ teaspoon ground cinnamon ½ cup butter, melted

Filling:

3 8 ounce packages cream cheese 1 cup sugar 2 tablespoon all-purpose flour 1 teaspoon vanilla ½ teaspoon finely shredded lemon peel (optional) 2 eggs 1 egg yolk ¼ cup milk Dairy sour cream (optional) Seedless red raspberry preserves (optional)