Easy Chicken Caprese Recipe

Ingredients

• 2 pounds boneless skinless chicken breasts, cut in half lengthwise
• 1/2 teaspoon salt, divided
• 1/2 teaspoon freshly ground black pepper, divided
• 1 tablespoon extra virgin olive oil
• 2 tablespoons unsalted butter, divided
• 1 medium yellow onion, finely chopped (about 3/4 cup)
• 3 cloves garlic, minced (about 1 tablespoon)
• 1/2 cup chicken stock
• 1/3 cup balsamic vinegar
• 1 cup cherry tomatoes
• 1 tablespoon Italian seasoning
• 8 ounces whole milk fresh mozzarella pearls, drained
• 1/4 cup chopped fresh basil leaves