For the paprika potatoes, boil the heirloom potatoes in salted water until they begin to soften.
Drain the potatoes and cut them into 1/2 cm thick slices. Heat the oil in a large pot and saute the onion until translucent.
Deglaze with the soup and add the paprika, diced tomatoes, pepper, cumin and the potatoes.
Bring everything slowly to a boil and simmer gently for 20 to 25 minutes until all the liquid has boiled away.
Finally, stir in the sour cream. Sprinkle paprika potatoes with a little paprika powder and serve.