Lemon and Blueberry Polenta Cake

Ingredients 6 tablespoons (90ml) egg whites 130g fine polenta 75g almond flour or gluten-free flour 3/4 teaspoon baking powder 2/3 teaspoon bicarbonate of soda 120ml maple syrup 80ml natural plant-based yoghurt Zest and juice of 1 1/2 lemons 300g blueberries (for substitute with blueberries or, in winter, orange slices) Method preheat the oven to 180°C/gas