1. Combine pie filling and lemon juice; spoon into pastry shell. 2. In a large bowl, combine flour, brown sugar, lemon peel, cinnamon and nutmeg; cut in peanut butter and butter until crumbly. 3. Sprinkle over filling. 4. Bake at 400 for 20-22 minutes or until topping is lightly browned. 5. Cool on wire rack.
