Begin by preheating your oven to 250°F/120°C.
In a small mixing bowl, combine the lime juice, ground cumin, garlic powder, salt, and black pepper. Whisk together until thoroughly blended.
½ teaspoon ground cumin, 1 tablespoon garlic powder, 2 tablespoon lime juice, Sea salt and freshly ground black pepper
Proceed to massage the spice mixture into the pork shoulder until it is fully coated. Then, create 6 small incisions in the pork shoulder and insert a garlic clove into each one.
4 lb pork shoulder, 6 garlic cloves
Next, arrange the sliced onion at the bottom of a large roasting pan. Place the bay leaves on top of the onion, and then add the seasoned pork shoulder. Cover the pan with foil.
1 onion, 1 bay leaf
Bake the pork shoulder in the oven for approximately 4 hours, or until the meat is tender enough to pull apart easily with a fork.
When done, allow the pork shoulder to rest for 15 minutes. Afterward, shred the meat and mix it with the pan drippings before serving.