To prepare a tart apple cranberry crumble recipe, first you need to prepare the ingredients. First, you'll need the following ingredients: Apples: Preheat oven to 375?F (190?C) Grease and flour two 8-inch square baking pans. Add the apple slices to the pan and bake for 20 minutes. Remove the apples from the oven and stir in the sugar, cinnamon, and nutmeg. Pour the wet ingredients into the dry ingredients and mix until they're evenly coated. Then, add the berries and cook for an additional 5-10 minutes or until the mixture is bubbly and crumbly. Serve warm or at room temperature.