1Heat gas or charcoal grill. Brush both sides of chicken with 1 tablespoon of the oil; sprinkle with garlic-pepper blend. In blender, place remaining oil, the mint, lemon juice, salt and pepper. Cover; blend until smooth. Set aside.
2Place chicken on grill over medium heat. Cover grill; cook 10 to 12 minutes, turning once, until juice of chicken is clear when center of thickest part is cut (at least 165°F). Remove chicken from grill to cutting board. Loosely cover; let stand 3 minutes.
3Meanwhile, cook and drain linguine as directed on package, adding peas during last 3 minutes of cooking time. Toss linguine and peas with reserved mint mixture and the mozzarella; cover to keep warm.
4Slice chicken crosswise. Place linguine mixture on platter or individual plates; arrange chicken on top. Sprinkle with chives.