Onions peel, in columns cut. Heat butter. Fry the onions for about 8 minutes. Season with salt and pepper, let cool down a little. Grate parmesan.
Wash and chop the herbs. Knead flour, quark, baking powder, 6 tablespoons of milk, oil, herbs and a little salt. Roll out on a greased baking tray. Spread onions on it. Sprinkle with parmesan. Whisk eggs and 125 ml milk. Season with salt and pepper. Drizzle over the onions. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 20-25 minutes.
Sprinkle with parmesan. Whisk eggs and 125 ml milk. Season with salt and pepper. Drizzle over the onions. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 20-25 minutes. Serve with Parma ham