Preheat the Oven: Preheat oven to 350°F / 175°C (155°C fan-assisted).
Prepare the Filling: In a 20 x 20 cm baking dish, combine the plums, blueberries, cinnamon, lemon zest, lemon juice, arrowroot (or cornstarch), sea salt, and brown sugar (if using). Toss everything together until the fruit is evenly coated and well-mixed.
Make the Topping: In a medium bowl, mix together the rolled oats, almond meal, sliced almonds, mascavado sugar, and sea salt. Add the softened coconut oil (or butter) and use a fork to work it into the dry ingredients until the mixture is fully incorporated and crumbly.
Assemble the Crisp: Evenly sprinkle the oat mixture over the fruit filling in the baking dish, ensuring the fruit is fully covered.
Bake: Place the dish in the preheated oven and bake for 40-45 minutes, or until the topping is golden brown and crisp, and the fruit is bubbling. If the topping begins to brown too quickly, cover the dish loosely with foil for the last 5 minutes of baking.
Serve: Let the crisp cool slightly before serving. It’s perfect on its own or with a scoop of vanilla ice cream. Enjoy!
Sweetness: Depending on the natural sweetness or ripeness of your plums and your personal preference, you can add 1 tablespoon of brown sugar to the fruit mixture. Feel free to adjust to your taste.
Frozen Blueberries: If you’re using frozen blueberries, increase the amount of arrowroot or starch to 1 tablespoon to help thicken the extra juices they release.
Serving Tips: This plum crumble with oats is equally delicious whether enjoyed warm from the oven or at room temperature. For leftovers, store them in the fridge and give them a quick reheat before serving to bring back that fresh-from-the-oven warmth and flavour.
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