Preheat your oven to 325°F.
Place the corned beef brisket in a large Dutch oven. Pour Liquid Riot’s Irish Goodbye Stout over the brisket, adding enough water to cover the meat if necessary.
Add the onion quarters and minced garlic to the pot. Cover and bring to a simmer on the stove top, then transfer the Dutch oven to your preheated oven.
Braise the brisket for about 3 hours, or until it is tender.
Add the potatoes, carrots, and cabbage wedges to the pot. Drizzle the maple syrup and apple cider vinegar over the vegetables.
Cover and return the pot to the oven. Continue cooking for another hour, or until the vegetables are tender.
Adjust seasoning with salt and pepper, then transfer the corned beef to a cutting board, letting it rest before slicing.
Serve the sliced corned beef surrounded by the braised vegetables, garnished with fresh herbs.