Braised Beef Brisket with Pickled Walnuts

Name: Braised Beef Brisket with Pickled Walnuts
Ingredients: 2 lb. fresh beef brisket; Maldon or other sea salt and freshly ground black pepper; Flour; 3 Tbsp. lard; 8 small yellow onions, peeled and quartered; 1 medium leek, trimmed and thickly sliced on the diagonal; 3 stalks celery, peeled and thickly sliced; 4 small turnips, trimmed, peeled, and quartered; 1 Tbsp. mushroom ketchup or Lea & Perrins Worcestershire sauce; 1 Tbsp. anchovy paste; 6 pickled walnuts, quartered lengthwise; 3 Tbsp. pickled-walnut liquor; 2 bay leaves; 4 cups beef stock