Preheat the oven to 175°C.
Soak the dates in warm water for 1 hour.
Blend the dates with a little of the soaking liquid into a smooth caramel paste.
Mix the oat flour, oat flakes, baking powder, vanilla extract, cinnamon, and salt in a bowl.
Add the date paste and melted coconut oil. Mix into a crumble dough. It should not be too wet or too dry. Too dry? Add a little of the soaking liquid from the dates. Too wet? Add some extra oat flour.
Line a square baking pan (approx. x 20 cm) with two strips of baking paper placed criss-cross.
Press ¾ of the dough firmly onto the bottom.
Put the blueberries in a saucepan with chia seeds, lemon juice, and zest. Bring briefly to a boil and let thicken slightly. Let cool for a few minutes.
Spread the blueberry jam over the base.
Crumble the rest of the dough over the top.
Bake for 25 minutes until the top is light golden brown.
Let cool before cutting into nice square pieces.
Tips
- Add a handful of chopped nuts to the crumble for extra crunch.
- Finish with some extra lemon zest after baking for freshness.
- Do you want them softer? Bake for 2 minutes less.
- Only cut them when fully cooled for crisp edges.
- Also delicious with raspberries or a mix of red fruits.
- In the refrigerator:Store airtight for up to 5 days.
- In the freezer:Freeze for up to 3 months. Individually packing is convenient.
- Defrost:1 to 2 hours at room temperature or briefly in the microwave (20-30 seconds).