Peel the onion and cut it into small pieces.
In a Reindl fry the onion in enough lard until light yellow.
Add the meat, salt, tomatoes and, if desired, a finely chopped bell pepper.
Steam everything together until the juice has boiled away. Sprinkle with paprika powder and flour, deglaze and add 1 liter of water.
Dice the potatoes cooked the day before and add to the boiling soup. Season to taste with the remaining spices.