Skillet Balsamic-Glazed Chicken

Whisk together the vinegar, chicken broth, sugar, garlic, and Italian seasoning in a small bowl. Put chicken in a shallow bowl and add marinade. Allow to marinate for 20 minutes, turning chicken halfway.

Heat oil in a large skillet over medium-high heat. Remove chicken from marinade and place in skillet, saving marinade. Cook chicken for 4 minutes on each side. Add remaining marinade and cook until chicken is no longer pink in the center and the juices run clear, and sauce has started to thicken and coat chicken, 4 to 5 minutes more. An instant-read thermometer inserted into the center should read at least 165 degrees F (74 degrees C).