Whilst the berries are cooking, preheat the oven to 170°C fan (190°C conventional / 375°F / gas mark 5) and line a 20cm (8”) square baking pan with parchment paper.
Stir together the oats, oat flour and coconut sugar.
250 g porridge oats, 90 g oat flour, 115 g coconut sugar
Stir in the melted coconut oil and maple syrup until combined.
115 g coconut oil, 100 g maple syrup
Separate off 1/4 of the mixture and stir the pecans into this 1/4 batch. Reserve this for the crumble topping.
75 g pecans
Press the remaining 3/4 of the mixture firmly into the lined baking tin to form a flapjack-style base. Use something with a flat base such as a mug to press the flapjack layer down firmly to flatten it out and compact the mixture.
Once the fruity mixture has reached a thick and jammy consistency, pour it over on top of the flapjack base.
Sprinkle over the crumble and pecan topping.
Bake for 40 minutes until golden.
Leave to cool completely before slicing (ideally at least 4 hours in the fridge).
Serve the slices as they are or with hot dairy free custard. Yum!