Melt butter in hot pot, add Garlic.

Rub roast with rub mix. Brown all sides. Add diced onion until soft.

Add beer, water and Worcestershire.

Add Quartered Onion and potatoes.

Bring to boil. Simmer on low for 3 hours, add carrots.

Simmer until all are done and roast falls apart.

Shred roast. Add 2T flour and water in a slurry. Stir. Remove from heat.