Wash the meat and rub it really dry. Salt, pepper and rub a thin layer of mustard. Sear the roast on all sides.
Roughly chop the carrots and leek. First deglaze the meat with half a bottle of dark beer and briefly bring to the boil for about 1 minute.
Add the remaining spices and ingredients and pour in the broth. Season to taste with salt and pepper. Cover the stove with a lid and simmer for about 2 - 2.5 hours.
Let the meat rest in the stock for about 3 hours or longer so that the roast takes on the taste of the sauce. Pour the sauce through a sieve and bind with a sauce thickener. Brussels sprouts and potatoes go well with this.