Let the roast cook in the oven preheated to 220 degrees for about 1 hour. If the stew boils down too much, reduce the heat to 180 degrees.
Remove the meat from the sauce and wrap it in aluminum foil. Remove the herbs from the sauce. Puree the sauce, along with the potatoes and shallots, with the mixer. Add the cream, bring to the boil and add the finely chopped fresh herbs and season with salt and pepper. If the sauce is too thick, add a little bouillon to make it longer.
Slice the roast and place on a preheated platter. Surround with a little sauce, serve the rest separately with the meat.
Potato cakes, fried mushrooms or vegetables go well as a side dish.