Preheat the oven to 350 while you gather your ingredients.
Combine the fruit with the 1 tablespoon of flour in a 9-inch pie pan or similar-sized baking dish. Mix the rest of the ingredient together in a bowl, using your hands to form pea-sized crumbs. Sprinkle the topping over the fruit.
Bake for 45 minutes, until the topping is browned and the fruit juices are bubbling. Serve warm, and with ice cream for added tastiness!
Cover remaining crumble with foil and refrigerate for up to 5 days. To reheat, simply pop in the microwave for 30 seconds and top with ice cream or whipped cream, if desired.