Mix eggs, milk, salt, flour and baking powder with the whisk of the hand mixer to a smooth dough. Cover and let it swell for about 15 minutes. Peel and finely dice the onion. Wash the herbs, dab dry, put something aside for garnishing, chop the rest finely.
Heat 1 teaspoon of oil, fry the minced meat in it until crumbly, take it out. Sauté onion and herbs in hot frying fat. Add tomato paste and sweat briefly. Add strained tomatoes and 250 ml water, bring to the boil, stir in broth.
Let simmer for 10 minutes at mild heat. Stir mineral water into the pancake batter. Grease a coated pan (approx. 26 cm Ø) with oil and heat up. Bake 4 pancakes one after the other.
Season tomato sauce with salt and pepper. Add the minced meat to half of the tomato sauce and warm it up briefly. Spread the sauce on the pancakes and roll them up. Cut the rolls into 4 pieces.
Place in a greased casserole dish and pour tomato sauce over it. Sprinkle with cheese. Bake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 15-20 minutes. Garnish with herbs set aside.