Preheat oven to 350 degrees F. Spray a 9 inch pie plate or baking dish with cooking spray.Prepare the filling. Put the cranberries and apples into the pie plate. Lightly mix them together with your fingers. Sprinkle with ? cup of sugar.Prepare the crisp topping. In a medium bowl, whisk ½ cup of sugar and the egg until it’s foamy. Add the oats, flour, melted butter, and the cinnamon. Stir until well combined.Spoon the oat mixture over the fruit and spread into a thin layer.Bake for 45-50 minutes, until the crust is golden.Let the crisp cool for at least 1 hour before serving.