In a glass measuring cup or small bowl, combine the chicken stock, balsamic vinegar and honey. Stir to dissolve the honey. Add the garlic to the skillet and sauté for 30 seconds. Stir in the chicken stock mixture and bring to a boil. Reduce the heat to a simmer and add the chicken back to the skillet. Simmer for 4 to 5 minutes until the chicken is cooked through. The chicken is done when it feels firm to the touch and a meat thermometer inserted in the center reaches 170°F.