Corned Beef and Cabbage

Bahan-bahan (6 porsi)

• 1 (3–4 pound) corned beef brisket, with spice packet
• 1 large yellow onion, halved (or quartered)
• 6 g arlic gloves, smashed
• 2 1/2 cups beef stock
• 1 (12 ounces) bottle Irish stout or amber beer (Guinness, Smithwick’s, or similar)
• 1 bay leaf
• 2 teaspoons black peppercorns
• 1 1/2 pounds baby red or Yukon Gold potatoes, halved
• 4 large carrots, peeled and cut diagonally into large chunks
• 1 small head green cabbage, cored and cut into thick wedges
• fine sea salt and freshly-ground black pepper
• finely-chopped fresh parsley
• whole-grain Dijon mustard (optional)