The veal should be fresh, cleaned from veins and skin and choped to small cubes. Rinse the liver cubes under flowing water in a colander and set aside to drain.
Cut the onions to thin slices.
Slightly heat a pot.
Add 2 tablespoons of olive oil to the pot and also add the onions and sauté the onions until translucent.
Add two chopped garlic cloves and sauté for another 2 minutes.
Take out the seeds and the stem of the pepper and chop to small cubes. Add to the onions.
Chop the tomatoes to a similar size of the peppers and add to the pot.
Also add a tablespoon of tomato paste. Mix and cook everything for 5 minutes.
Add the spices and the vinegar.
Add the liver. Mix everything to blend and cook for another 10 minutes.
Taste and adjust spices if necessary.
Garnish with sliced onions mixed with chopped parsley and sumac.