Heat sesame oil in a large skillet over medium high heat.
Add ground beef and finely diced onion to the skillet. Cook the beef, breaking it up as it cooks, until the beef is no longer pink and the onions are tender, about 5-7 minutes. Drain off any excess grease.
In a separate bowl, whisk together brown sugar, low sodium soy sauce, rice vinegar, honey, minced garlic, ground ginger, and cornstarch.
Then cook for 1 minute on a low simmer to thicken the sauce.
Serve immediately while warm topped with sesame seeds and diced green onion stalks. Enjoy!
Notes
Refrigerate the leftovers in an airtight container for up to 5 days. We love serving this mixture over rice.