In a blender combine, juices, chipotle in adobo sauce, olive oil, salt and garlic. Cover short rib with marinade (reserve 1/4 cup). Marinate overnight.
Preheat oven to 275º F.
Remove short rib from marinade, sear and place in roasting pan. Cover with marinade and slow roast for about 3 1/2 hours.
Heat up remaining marinade. Remove and slice short rib, place on corn bread square and top with sauce.