Start large crockpot on high. Place quartered potatos, onion, celery and carrots in pot. place whole brisket on top of vegetables.

Add spices and pour guiness on top of beef, add water until meat is fully submerged. Cook on high 10-12 hours or until meat is tender.

Remove meat and veggies from liquid, set aside. Cut cabbage into quarters and press into liquid, cook 30-40 minutes or until cabbage is tender but not mushy. Add meat, stir, cook 5 more minutes and simmer, then serve.