Preheat oven to 180 °C/ 356 °F circulating heat/fan and brush a loaf pan with coconut oil (or margarine).
Peel one and a half bananas and mash them finely with a fork till you get a kind of "banana cream".
In a medium bowl wisk together flour, ground almonds, coconut sugar, mashed banana, a pinch of salt and 1 tbsp. cinnamon. Add baking powder and baking soda and drizzle 1 tbsp. cider vinegar directly onto the baking soda until it begins to foam.
Add coconut oil and plantbased milk and stir with a spoon to make an even batter.
Gently fold in the frozen blueberries and pour the batter into the prepared pan.
Bake banana bread at 180 °C/ 356 °F circulating heat/fan for approx. 35-38 minutes (check the doneness with a wooden stick).
Let banana bread cool down, remove from the pan and enjoy.