If necessary, drain off any excess fat from roasting pan; place pan over medium-high heat. Stir in garlic salt, cumin, broth and remaining 1 cup corn. Cook 2 to 3 minutes, stirring occasionally, just until corn is tender. Stir in lime peel, lime juice, tomatoes and avocado. Cook just until thoroughly heated. Remove string from pork; cut across grain into slices. Serve pork with corn-avocado salsa; garnish with lime and cilantro.