Coat the bottom of your pan in the sesame oil then place the pan over high heat. When the oil is hot, add the chicken and turn the heat down to medium.
Immediately add the brown sugar while the chicken starts to sauté.
Add the corn starch and stir.
Add the rice wine vinegar, soy sauce and garlic, then stir to combine again.
Top with the broccoli and stir periodically for 10 minutes or until the chicken is cooked through.