Beat the eggs, 1 pinch of salt, milk and mineral water. Stir in flour vigorously. Leave to swell for about 20 minutes. In the meantime, clean the mushrooms. Cut broccoli into florets and wash, blanch in boiling salted water for about 5 minutes, drain, rinse cold and drain.
Wash tomatoes, cut in half, remove stalk and seeds. Cut the flesh into cubes. Heat oil in portions and bake about 8 pancakes from the dough one after the other. Melt the fat in a saucepan. Sauté the mushrooms, add cream, bring to the boil and season with salt and pepper. Add broccoli and bring to the boil briefly. Finally fold in tomatoes. Fold the pancakes into quarters and fill with the vegetable ragout. Place the filled pancakes in a greased casserole dish.
Add broccoli and bring to the boil briefly. Finally fold in tomatoes. Fold the pancakes into quarters and fill with the vegetable ragout. Place the filled pancakes in a greased casserole dish. Grate cheese and sprinkle over the pancakes. Bake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 10 minutes