Chicken Panini with Pesto and Mozzarella

INGREDIENTS

• 3 Tbs. pesto, purchased
• 4 slices crusty white sandwich bread
• 5 oz. fresh mozzarella cheese, cut into 8 thin slices
• 1 small roasted red pepper in vinegar, halved
• Breast meat of classic grilled chicken (see related recipe at left), cut into 6 slices (about 5 oz. total)
• 6 oz. arugula, stems removed
• 3 Tbs. unsalted butter, at room temperature