In a large skillet, cook the meat & onion until the meat is cooked thru and the onion is translucent.
Add the shredded cabbage & carrots to the mixture - cook & stir for 5 minutes on medium high heat.
Mix together the garlic, ginger, sesame oil, soy sauce, & rice vinegar. Pour it over the cabbage mixture & stir to combine. Cook another 10 minutes on medium heat, stirring often.
Serve immediately. Garnish with green onions if desired.