Preheat oven to 350°F. Place all ingredients in an ovenproof baking dish. Seal tightly and bake for 3 hours. Remove from oven and allow meat to cool, while still covered. One meat has cooled, transfer to cutting board. Strain out onions and garlic and discard. Shred meat either by hand or pulse in a food processor. Work some of the braising liquid into meat to make it moist. Season with salt and pepper.