Preheat oven to 350 degrees F (175 degrees C)
Grease your baking pan with a little butter on the bottom and sides of dish.
Prepare your crumble topping. In a medium bowl add butter (coconut oil), oatmeal, almond meal, brown sugar, salt and mix until crumbly. You can use a fork or your hands. Set aside
Dump your plums, cherries, cornstarch, sugar, cinnamon, ginger and lemon juice into the 9x 9 greased pan and stir just until mixed.
Sprinkle your prepared crumble topping on top of your cherry and plum mixture.
Bake uncovered for about 40-45 minutes or until the crumble topping is golden brown and the fruit is bubbling.
Serve with a dollop of coconut whipped topping or vanilla ice cream on top and enjoy.