Mix eggs, 1/8 litre milk, mineral water, 1 pinch of salt, 100 g flour and baking powder to a smooth dough. Leave to swell for 30 minutes. Melt the fat in a saucepan. Sweat 25 g flour in it.
Deglaze with 1/4 litre milk while stirring and bring to the boil. Stir in 25 g cheese. Season to taste with salt and pepper. Peel onion and chop finely. Wash and clean the zucchini and cut into thin slices.
Clean the mushrooms, rub with kitchen paper and cut into slices. Wash and clean the tomatoes and cut them into small cubes. Wash chives and cut into small rolls. Heat 3 tablespoons of oil in a pan.
Fry onion, zucchini and mushrooms for 5 minutes. Fold in tomatoes and chives, except 1 tablespoon for garnishing, and season with salt and pepper. Heat 2 tablespoons of oil in a pan (20 cm Ø) in portions.
Fry 5 pancakes from the dough. Layer the pancakes, vegetables and sauce to form a tower. Sprinkle the pancakes with 25 g cheese and bake in a preheated oven (electric cooker: 200 °C/ convection oven: not suitable/ gas: level 3) for approx. 10 minutes.
Serve garnished with tomato slices and sprinkled with chives.