An authentic Cuban sandwich must have roast pork in it to be worth its salt, and if you want to do it right, make lechón asado. It's not just for sandwiches; this stands up on its own as a main dish with some rice and black beans.
Lechón Asado (Cuban-Style Roast Pork)
First, make the mojo marinade.
15 cloves garlic, minced 2 teaspoons salt 2 cups orange juice 1 cup lemon juice 1 cup lime juice 1 cup onion, chopped 1 teaspoon oregano 1 cup olive oil
2 pounds boneless pork shoulder or loin of pork
Mix all ingredients together in a bowl or container. Add the pork and let marinate 4 to 5 hours or overnight.
Preheat oven to 325 degrees F. Place the pork and some marinade in a baking dish. Slowly roast in the oven until the internal temperature of the meat reaches 155 degrees F. Don't let the meat dry out; spoon more marinade over it if needed.