Briefly sweat the mustard in the pan in which the meat was fried and deglaze with the stock and water. After the roast set has dissolved, pour the mixture into the roasting pan. Salt and pepper everything abundantly.
Wash the tomatoes, quarter them and add them with the bay leaf and the chopped herbs. Mix everything well and distribute part of the sauce over the meat. Bring everything to the boil briefly and cover and let simmer for about 120 minutes. Possibly thicken the sauce.
Ribbon noodles taste good with it.
If there is anything left over, remove the meat from the bones, cut into pieces and freeze with the sauce.