Preheat the oven to 350 degrees F. Grease a 9-inch square baking dish with butter.
In a large bowl, combine the cherries, granulated sugar, cornstarch, lemon juice and vanilla extract.
Transfer the cherry filling to the baking dish.
To make the crumble topping, stir the oats, flour, light brown sugar, almonds, cinnamon and salt in a large bowl. Then pour in the butter and stir to combine. It should be in clumps.
Scatter the crumble topping over the cherries.
Bake for 40-45 minutes until the crumble is well browned and the cherry filling is bubbling.
Allow the crumble to cool before serving either warm or at room temperature.
