Berry Oat Crumble Bars

For the Filling:

450g frozen berries of choice (I used a mixture of raspberries, blueberries & blackberries)

2 tbsp cornstarch

3 tbsp water

60ml maple syrup or honey

1 tsp vanilla extract (optional)

For the Base and Topping:

300g oats

100g ground almonds

100g butter or coconut oil, melted

60ml honey or maple syrup

80g soft brown sugar

½ tsp cinnamon (optional)