For the marinade: Add ingredients to blender and mix until well blended. Remove fat from meat and place meat inside Ziploc(R) bag; pour marinade over it and close. Refrigerate bag overnight. The next day: Place banana leaves in a deep roasting pan, covering the bottom and the edges of the pan; add marinated pork. Seal with a second layer of banana leaves. Place in oven at 350 degrees for two hours. Test for doneness. Meanwhile, slice a red onion and place in a bowl. Add 1/2 cup fresh lime juice and 1/3 cup fresh orange juice. Serve with tortillas, black beans and rice, habanero sauce and plantains.