1-For the filling, combine the plums and maple syrup in a saucepan over medium heat. Bring to a boil, then simmer for 15 to 20 minutes until the plums are soft, pulpy, and slightly firm. Allow the mixture to cool and refrigerate until needed.

2-Next, for the base, preheat the oven to 180°C. Grease and line a 20cm x 20cm cake pan. In a food processor, combine the rolled oats, almond meal, maple syrup, coconut oil, sea salt flakes, and cinnamon until finely chopped and well mixed. Press the mixture evenly into the base of the prepared pan and bake for 15 minutes, then cool. This step creates a solid foundation for your slice.

3-Finally, for the topping, mix rolled oats, slivered almonds, pumpkin seeds, sunflower seeds, and coconut oil in a bowl until combined. Spread the plum mixture evenly over the cooled base, then evenly spread the topping mixture over the plums, pressing lightly. Bake for 20 minutes or until the topping is light golden, then cool in the pan, remove, and cut into bars or squares.