How to Make It
Preheat broiler to high.
Heat 1 tablespoon oil in a large ovenproof skillet over medium-high. Sprinkle chicken with 1/4 teaspoon salt and 1/4 teaspoon pepper. Add chicken to pan; cook 5 minutes on each side. Remove pan from heat.
Combine panko, cheese, and butter in a bowl. Spread pesto evenly over chicken in pan; top with panko mixture, pressing to adhere. Place pan in oven; broil 2 minutes or until browned.
Heat remaining 1 1/2 tablespoons oil in a skillet over medium-high. Add tomatoes; cook 6 minutes or until softened. Add garlic; cook 30 seconds, stirring constantly. Stir in remaining 1/4 teaspoon salt, remaining 1/4 teaspoon pepper, and vinegar. Serve with chicken.