Peel and finely chop the onion. Peel, wash and roughly grate the potatoes. Grate cheese also roughly. Mix potatoes, onion, egg, flour, pepper and salt. Mix in corn and cheese.
Heat clarified butter in a pan and bake 3 buffers of the potato dough in the pan one after the other. In the meantime, wash the cucumber and cut into cubes. Clean and wash the radishes and cut them into sticks.
Peel the garlic and press it through a garlic press. Wash the chives, dab dry and cut into small rolls. Mix quark, yoghurt, milk, garlic, salt and pepper. Mix in radish and cucumber.
Arrange buffers, ham and some curd cheese on plates and serve garnished with parsley and salad leaves as desired. Serve the rest of the quark separately.