Peel the potatoes and cook for 20 minutes in boiling salted water. Drain, press hot through a potato press and let cool. Cream quark and eggs. Peel and finely dice onion.
Heat the fat in a frying pan and fry the onion in it until transparent. Add onion, starch and potatoes to the quark and mix well. Season well with salt, pepper, paprika, nutmeg and marjoram.
With wet hands, form about 8 lentils from the dough and turn in the breadcrumbs. Cut bacon into fine strips. Heat oil in a pan and fry the bacon in it until crispy. Remove the bacon and fry the lentils in it until golden brown.
Wash the chives and cut into fine rolls. Mix with the bacon and sprinkle over the lentils. Serve with a fresh tomato salad.