Preheat oven to 160C/ 320F/ GM 2 ½
Chop the beef into 1-1.5 inch cubes if necessary, and season
Heat a large casserole pan and add ½ the oil then fry ½ of the beef, turning frequently until the meat is browned all over. Remove from the pan and fry the remaining meat in the same way. Set all meat aside
Finely dice the large onion and celery sticks and add to the pan along with the remaining oil. Fry for 2-3 minutes. Crush the garlic clove and chop the bacon then add to the pan and continue to cook until the vegetables are soft
Split the allspice berries open using a pestle and mortar or the end of a rolling pin. Sprinkle into the pan with the bay leaves and black pepper
Stir in the flour and cook for 1 minutes, then deglaze the pan with the red wine. Allow the liquid to evaporate
Peel the baby onions and wipe the chestnut mushrooms. If the mushrooms are large chop in half. Place in the pan and then return the browned meat to the pan. Dice the pickled walnuts and scatter into the pan with a few sprigs of fresh thyme
Pour the stock over everything, give a good stir, cover and cook for 2½ hours, stirring midway through
Just before the cooking time is up, peel and chop the carrots and Jerusalem artichoke into thick pieces. Add to the pan with the potatoes and cook for a further 45 minutes
Make the dumplings when there is 10 minutes cooking time left: Put the flour, baking powder, salt and suet into a small mixing bowl. Strip approx 1 tablespoon thyme leaves from their stems and crumble the cheese. Add both to the bowl and stir then add just enough milk to form a soft but not sticky dough. Using floured handles roll into 8 equal-sized balls
Top the stew with the dumplings, cover and cook for a further 20-30 minutes – removing the lid for the last 10 minutes for a crisper finish to the dumplings if preferred
Check and adjust seasoning as necessary, then serve straight away with a sprig of thyme to garnish