Wash the potatoes and cut them into small dice. Fry them in the vegetable oil until golden brown. Remove them from the pan and put them on a paper towel, so any excess oil gets absorbed.
Slice the sausages and fry them in the same oil. Remove them from the pan.
Cut the onions in halves, then slice them. Finely slice the garlic cloves. Fry the onions until softened. After about 5 min add the garlic to the pan. Remove onions and garlic from the oil.
Add 3 tbsp tomato paste to the pan. Add 3 tbsp hot water, turmeric, black pepper and chilli powder and let everything simmer over medium heat for about 5 min.
Add all the other ingredients back to the pan and combine them.
Serve with bread or fill sandwich baguettes with it. Add some lettuce and khiaar shoor (salty pickled cucumbers), if you like.