In another bowl, beat the eggs with the icing sugar. Add the milk and melted butter.
Add this mixture to the flour. Work the dough by hand until it is smooth and homogeneous. Form into a ball, cover with a damp cloth and refrigerate for 2 hours.
On a baking tray lined with baking paper or on a floured work surface, roll out the dough to about 1 cm thickness. Cut out doughnuts using cookie cutters.
Heat a deep fryer to 190°C and fry the doughnuts until golden brown, turning them so they puff evenly. Drain on absorbent paper.
Icing
Mix the egg white, honey, icing sugar, lemon juice, and blueberry juice until the desired consistency is reached. Dip the donuts one-third into the glaze.
Assembly
Decorate as you wish, using fresh fruit (blueberries and blackberries) and small sprigs of mint.