Preheat the oven to 180°C (160°C fan-forced). Line a 12-hole (1/2 cup capacity) muffin tray with patty cases.
Mix together the flours, coconut, sugar, baking powder and lemon zest in a large bowl.
In separate bowl, whisk the egg, then whisk in the yoghurt, ricotta, oil, lemon juice and vanilla bean paste.
Make a well in the centre of the dry ingredients and stir in the wet ingredients, mixing until just combined. Fold in half the blueberries, and scatter the remaing blueberries on top of the muffins.
Spoon the muffin mixture into the patty cases.
Bake for 20-25 minutes until a skewer inserted comes out clean.
Leave to cool for a few minutes before turning out onto a wire rack.