Wash the rosemary and shake dry. Pour 200 ml of boiling water over the porcini and leave to stand for a while. Clean the mushrooms and halve them if necessary. Peel and halve shallots. Take the porcini out of the water, squeeze them out and collect the water.
Chop the porcini very finely. Wash the meat, dab dry, place them next to each other on a large board and season with salt and pepper. Spread with mustard, cover with black pudding and a sprig of rosemary. Roll up and stick together with wooden skewers. Heat the oil in a casserole, add 4 sprigs of rosemary, remove from the hot oil immediately and put aside. Put the roulades in the oil and fry them thoroughly all around. Add the shallots, mushrooms and porcini mushrooms and fry briefly. Add tomato paste, deglaze with stock, porcini water and wine, bring to the boil, cover and stew for 1 1/4 - 1 1/2 hours. Then remove the roulades from the stock and keep warm. Bring the stock to the boil, stir in the sauce thickener, bring to the boil again and season with salt, pepper and sugar.
Put the roulades in the oil and fry them thoroughly all around. Add the shallots, mushrooms and porcini mushrooms and fry briefly. Add tomato paste, deglaze with stock, porcini water and wine, bring to the boil, cover and stew for 1 1/4 - 1 1/2 hours. Then remove the roulades from the stock and keep warm. Bring the stock to the boil, stir in the sauce thickener, bring to the boil again and season with salt, pepper and sugar. Arrange the roulades on a plate with the rosemary sprigs and sauce put aside. SpƤtzle taste good with it