Wash the potatoes and cook in boiling salted water for 20-25 minutes. In the meantime clean and wash spring onions and cut them into rings. Grate cheese roughly. Drain the potatoes, peel them and press them through a potato press.
Stir in the egg yolk. Add spring onions and cheese, except a little for garnishing, and season to taste with salt, pepper and nutmeg. Form 8 thalers from the mixture with wet hands. Heat oil in a pan and fry the thalers in it for about 10 minutes until golden brown on both sides.
Peel the vegetable onion, cut into slices and halve. Clean, wash and cut the peppers into wide strips. Heat the fat and fry the bell pepper and onion for about 5 minutes. Wash the sage, pluck it from the stems, put some leaves aside for garnishing and add the rest to the vegetables.
Stir in tomato paste, deglaze with broth and bring to the boil. Season to taste with salt, paprika and cayenne pepper. Distribute on plates and arrange 2 potato taler on each plate. Serve garnished with grated cheese and sage leaves.