Roasted Pepper Chicken Sandwiches Recipe

In a large resealable plastic bag, combine the first six ingredients; add chicken. Seal bag and turn to coat; refrigerate for 1 hour. In a large nonstick skillet coated with cooking spray, cook and stir onion and sugar over medium heat until tender. Add garlic and seasonings; cook for 1 minute. Stir in roasted peppers and vinegar; cook 2 minutes longer. Remove from the heat; keep warm. Drain chicken if necessary, discarding any excess marinade. Moisten a paper towel with cooking oil; using long-handled tongs, lightly coat the grill rack. Grill chicken, covered, over medium heat or broil 4 in. from the heat for 4-7 minutes on each side or until a thermometer reads 170 °. Cut into 1/2-in. strips. Cut focaccia in half lengthwise; spread mayonnaise over cut side of bread bottom. Layer with cheese, chicken strips and pepper mixture. Replace bread top; lightly press down. Grill, covered, for 2-3 minutes or until cheese is melted. Cut into four sandwiches.