Peel, wash and chop the potatoes. Clean, wash and cut leek into rings. Cut cabanossi into slices. Heat oil in a casserole, fry cabanossi in it while turning, take out.
Add potatoes to the frying fat and fry vigorously while turning. Add leek, fry briefly, season with salt, pepper, sugar and paprika.
Add the tomato paste and sauté briefly. Add the cabanossi. Deglaze with stock, bring to the boil, cover and cook for about 15 minutes. Add tomatoes, bring to the boil, season with salt, pepper, sugar and paprika, simmer for 2-3 minutes.
In the meantime, wash the chives, shake them dry and cut them into fine rolls. Arrange goulash in a terrine, sprinkle with chives.