Mix eggs, milk, flour and salt to a smooth dough. Leave to swell for approx. 20 minutes
Wash and sort blueberries. Stir mineral water into the pancake batter. Heat 1 tablespoon of fat in a pan. Pour 1/4 batter as 3 small pancakes into the pan and sprinkle with 1/4 blueberries. Bake for about 2 minutes on each side until golden brown and keep warm. Bake about 9 more pancakes in the same way
Mix cinnamon and sugar. Arrange pancakes on plates and sprinkle with cinnamon sugar. Decorate each pancake with a blob of sour cream and possibly some mint leaves
Instead of fresh blueberries you can use fruits from the jar or frozen goods. The pancakes become particularly airy if you separate the eggs, beat the egg whites until stiff and fold them into the dough just before baking