Mix the dry and wet ingredients separately, then stir together. Leave the dough to rest for 10 minutes. In the meantime, cook the blueberries over a low heat and leave to cool. Then puree to a cream with the ricotta, sugar and Verjus pur extra sour. Pour the pancake batter into a pan in batches and fry on both sides until golden brown. Spread with the ricotta and blueberry cream, alternatively serve with fresh fruit and maple syrup.