Pernil is pork marinated in a sauce of bitter orange juice, onion, garlic, achiote, cloves, cinnamon, cumin and panela and slow roasted in the oven for several hours.
If you're looking for a traditional pot roast recipe, try this 5-star, no-fail version. Cuts of beef that perform well for pot roasting go by many different names: Blade roast, cross-rib roast (or shoulder clod), seven-bone pot roast, arm pot roast, and boneless chuck roast are all acceptable cuts.