Sort the spinach, wash and drain very well. Peel and finely chop the onion. Peel garlic and chop finely. Heat 1 tablespoon of oil in a wide saucepan. Fry onions and garlic for 1-2 minutes, then add spinach.
Collapse the spinach and season to taste with salt, pepper and nutmeg. Place the spinach in a sieve and drain.
Grate parmesan. Separate eggs. Beat egg whites until stiff. Carefully fold in the egg yolks and 50 g Parmesan, then the spinach and finally the egg white. Season with salt and pepper. Heat 2 tablespoons of oil in an ovenproof pan (top approx. 26 cm Ø).
Pour in the egg mixture and let it simmer on the stove at medium heat for about 3 minutes. Sprinkle the rest of the cheese onto the omelette and bake in a pan in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see
manufacturer) for about 10 minutes.
Season quark with pepper. Remove the omelette from the oven and serve immediately. Add the quark. Roasted baguette bread tastes good with it.