Porchetta Sandwich

Make the salsa verde: In a medium bowl, mix together shallot, parsley, chives, vinegar, oregano, and salt; whisk in olive oil until emulsified. Stir in mustard and lemon juice; set aside.

Make the sandwich: Cover split sides of rolls with salsa verde. Place 3 porchetta slices and some of the crackling on one half of each of the rolls; top with arugula and sandwich together with remaining roll half; serve.