Ever since humankind first put food to fire, the world's grill cultures have wrapped and rolled flavorful ingredients. Steven explores two South American grilled classics-a stuffed chicken breast from Uruguay called pamplona, and a colorful stuffed beef roll Argentineans know as matambre. Plus, a Project Fire Mystery Box "roll" that may involve a crustacean. PAMPLONA OF CHICKEN WITH EMBER-ROASTED PEPPERS; MATAMBRE WITH A CAJUN TWIST; MYSTERY BOX CHALLENGE - PROJECT FIRE LOBSTER ROLL