Directions

• In a small bowl combine the first 6 ingredients. Set aside. Sprinkle roast with salt and pepper. Select saute or browning setting on a 6-qt. electric pressure cooker. Adjust for medium heat; add oil. When oil is hot, brown roast on all sides. Press cancel. Add onion; pour orange juice mixture around meat.
• Lock lid; close pressure-release valve. Adjust to pressure-cook on high for 1 hour. Let pressure release naturally for 10 minutes; quick-release any remaining pressure. Remove pork to a cutting board; discard liquid and onion. Let stand for 15 minutes.
• Meanwhile, cut each hoagie in half lengthwise; flatten slightly. Spread cut sides with mustard. Cut pork into thin slices. Layer pickles, pork, ham and cheese over the mustard. Replace tops, brush with butter.
• Cook in batches on a panini maker or indoor grill until cheese is melted and bread is toasted, 5-7 minutes.