Mix the peppercorn blend, cumin, oregano, garlic, mint, cilantro, and lime juice in a blender to make the marinade.
Cut slits into both sides of the pork butt so it absorbs the seasoning. Season well with salt.
Transfer to a 6” deep half-size hotel pan or any deep oven-safe pan with a lid, such as a large Dutch oven. Cover with the marinade and massage it in. Marinate it for 8-10 hours or overnight.
After marinating, cover the hotel pan or Dutch oven with a lid and roast the pork butt at 250 degrees for 8-10 hours.
After roasting, use a pair of tongs to remove the bone and break up the meat add some of the cooking liquid to moisten and season with salt to taste.