Preparation: Chop the meat on cubes 2 x 3cm, the carrots on circles and then each circle on quarters. Chop also the leek on circles and slice the mushrooms. Add the olive oil in the pot and fry the meat until it starts to turn white. Add the carrots, the leek and the mushrooms. Stir and then add salt, black paper, red paper and the red wine. Stir everything and cover the pot. Cook on low heat around 40 min. Mix the tomato paste with water in proportions 1:4. Add it to the meal and cook for 3-4 min more. Remove from the hotplate and sift with parsley. Serve.