How to Make It
Rub the pork with the garlic and salt and place in a 5- to 6-quart slow cooker. Add the chicken stock, orange zest, and orange juice. Cover and cook on low until the pork is very tender, 7 to 8 hours. Pull pork into 1- to 2-inch pieces; toss with the lime juice. Return to slow cooker and keep warm.
Preheat broiler with the oven rack 6 inches from heat. Split the rolls length-wise. Spread the mustard on the bottom halves and top evenly with the pork, ham, and Swiss cheese. Broil just until the cheese is melted, 1 to 2 minutes. Top with the pickles and sandwich with the tops of the rolls.