Preheat your oven to 350 degrees. Spray a 9 inch baking dish with cooking spray and set aside.
Mix together the apples, lemon juice, zest, 1/4 cup of sugar, cinnamon, and nutmeg. Pour into your prepared dish.
Combine the flour, brown sugar, 1/3 cup sugar, cereal, butter, and salt. Mix until resembles coarse crumbs. Sprinkle on top of your apples and bake for 1 hour or until golden brown.
Serve hot with whipped cream or vanilla ice cream.