Stir eggs, mineral water and milk until smooth. Stir in flour with a whisk. Let the dough rest for a while. In the meantime defrost the peas, drain the corn. Clean and wash the peppers and cut them into small cubes.
Dice ham as well. Clean, wash and thinly slice the champions. Heat 1 teaspoon of fat in a pan. Fry 1/4 of the mushrooms for 3 minutes. Add 1/4 each of the remaining vegetables and ham. Season with salt and pepper. Spread 1/4 of the dough on top. Bake for about 5 minutes, turn and bake again for about 5 minutes. Process remaining vegetables and dough in the same way.
Add 1/4 each of the remaining vegetables and ham. Season with salt and pepper. Spread 1/4 of the dough on top. Bake for about 5 minutes, turn and bake again for about 5 minutes. Process remaining vegetables and dough in the same way. Serve each pancake sprinkled with crème fraîche and coarsely chopped dill