Step 1

Mix the oats with the yoghurt and let them swell. Mix the dry ingredients - flour, baking powder, salt, baking soda, cinnamon and walnuts in a bowl.

Step 2

Separately, beat the egg, oil, sugar and vanilla and add them to the dry mixture.

Step 3

Add the oat flakes and stir well, until everything is mixed, do not over mix.

Step 4

Finally stir with the frozen blueberries several times. Distribute the mixture into forms, such as paper muffin cups, and bake at 370°F (190 °C) in the oven for 20-25 minutes, or until tender.