Plum And Apple Crumble (Crisp) (Dessert)

Preheat the oven to 360 degrees F/180 degrees C, rinse and chop the apples and plums into slices about 1/3 to 1/2-inch thick, and transfer them to a large bowl. 2. Add the granulated sweetener, cornstarch, vanilla, and cinnamon and stir to combine. 3. Pour the apple plum mixture into a baking dish (a 9x13 or 8x8-inch dish works well). 4. Prepare the crumble topping by combining all the dry ingredients in a medium bowl, then add the oil and vanilla and mix with your hands to create a crumb consistency; if the streusel is a little dry, add a little more oil. 5. Sprinkle the crumble over the fruit and bake for about 35 minutes, until the filling is bubbling and the top is golden brown. 6. Allow to cool for at least 5 minutes before serving.