Stir eggs, salt, milk, mineral water, flour and baking powder until smooth. Let the dough swell for about 10 minutes. In the meantime wash and clean the chanterelles. Peel and finely dice the onion. Heat 1 teaspoon of fat one after the other.
Sauté the onions and chanterelles for 2-3 minutes in portions. Season with salt and pepper. Add 1/4 pancake batter each. Bake on each side for 3-4 minutes until golden brown. Wash the parsley, pluck off the leaves, chop them coarsely if necessary and sprinkle them abundantly over the pancakes.