Peel and wash the potatoes and cook in salted water for about 20 minutes
Clean the cabbage, cut out the stalk in a wedge shape. Cook cabbage in plenty of boiling salted water for 4-5 minutes, drain. Remove the outer leaves. Repeat until approx. 12 leaves are removed. Cut leaf veins flatter. Cut the rest of the cabbage into pieces.
Peel, wash and finely dice the carrots. Steam in boiling salted water for 3-4 minutes, drain. Peel and chop the onion. Drain potatoes, mash finely. Mix with egg, carrots, up to 2 tablespoons and onion, season. Place approx. 2 tbsp. each in the middle of 1-2 cabbage leaves. Roll up and pin
Fry the roulades in hot oil all around. Add cabbage pieces, 1/4 l water and stock. Bring to the boil, cover and stew for about 20 minutes. Remove the roulades and cabbage and keep warm. Stir tomato paste and cream into the stock. Thicken, season to taste. Serve everything