Step 1Combine juices, olive oil, zest, garlic and seasonings.Step 2Place pork in large resealable plastic bag. Pour marinade over pork and refrigerate for several hours or overnight.Step 3Place roast in slow cooker crock.Step 4Cover and cook on HIGH 4 to 5 hours or LOW 7 to 8 hours. Remove pork to cutting board. Reserve juices in crock.Step 5Shred pork. Add to crock and stir to combine with juices.Step 6Preheat panini press.Step 7Spread rolls with mustard. Layer cheese, ham, shredded pork and pickles in roll.Step 8Place in panini press and grill until toasted.