Wash the potatoes thoroughly and cut or slice them very thinly. Lay out on a baking tray lined with baking paper to form a thin tarte flambée. Let the potato slices overlap slightly
Season potato slices with salt and drizzle with oil. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see manufacturer) for approx. 25 minutes. In the meantime season quark with salt, pepper and caraway seeds. Clean and wash spring onions and cut into rings. Cut ham into strips
After about 15 minutes, spread the potato base with quark and cover with spring onions and ham