Chicken Caprese Skillet

Ingredients

For 4 servings

• 1/2 cup plus 1 tablespoon balsamic vinegar (divided)
• 1 tablespoon plus 1 teaspoon honey (divided)
• 4 small boneless (skinless chicken breasts (24 oz))
• 1¼ teaspoons kosher salt (divided)
• ½ teaspoon ground black pepper (divided)
• 2 tablespoons extra virgin olive oil (divided)
• 1 small red onion (diced (about 1 cup))
• 4 cloves garlic (minced (about 4 teaspoons))
• 4 cups sliced tomatoes: halved cherry or grape tomatoes ((2 pints) or ½- inch- diced peak season plum or other garden tomatoes)
• ¼ teaspoon dried thyme
• 4 ounces part- skim mozzarella pearls ((scant 1 cup) or 4 ounces block- style part- skim mozzarella cheese cut into bite-sized cubes)
• ¼ cup tightly packed fresh basil leaves (thinly sliced)