Healthy Chinese Ground Beef & Cabbage Stir-Fry

1 lb ground beef
1 large head cabbage, thinly sliced
1 large onion, sliced
2 cloves garlic, minced
1-inch piece fresh ginger, minced
2 tbsp soy sauce
1 tbsp oyster sauce (optional)
1 tbsp rice vinegar
1 tsp sesame oil
1/2 tsp cornstarch
1/4 tsp red pepper flakes (optional)
2 tbsp vegetable oil

How to Make It
1. Heat 1 tablespoon of vegetable oil in a large 
	skillet or wok over medium-high heat.
2. Add the ground beef and cook, breaking it into 
	crumbles, until browned. Transfer to a plate 
	and set aside.
3. Add the remaining tablespoon of vegetable oil 
	to the skillet.
4. Cook the onion for about 3 minutes until softened.
5. Stir in the garlic and ginger and cook for 1 minute 
	until fragrant.
6. Add the sliced cabbage and cook for 5–7 minutes, 
	stirring often, until slightly softened but 
	still tender-crisp.
7. In a small bowl, whisk together the soy sauce, 
	oyster sauce (if using), rice vinegar, sesame 
	oil, cornstarch, and red pepper flakes.
8. Return the cooked ground beef to the skillet.
9. Pour the sauce over the beef and cabbage, stirring 
	well to coat everything evenly.
10. Cook for another 2–3 minutes, until the sauce 
	thickens slightly.
11. Serve hot on its own or over steamed rice for 
	a complete meal.