How to Make It
Preheat the oven to 375°. In a medium bowl, toss the sliced apples with the lemon juice, granulated sugar and 1/4 teaspoon of the cinnamon. Spread the apples in two 9-inch glass pie plates and top with the blueberries and raspberries.
In another medium bowl, toss the oats with the light brown sugar, flour, ginger, salt and the remaining 1/2 teaspoon of cinnamon. Using your fingers, mix in the butter until crumbly.
Spread the topping over the berries. Set the pie plates on a baking sheet and bake for 35 minutes, or until the fruit is bubbling and the topping is golden brown. Transfer to a wire rack and let cool for 30 minutes. Serve the berry crumbles with heavy cream.