Mix together all the sauce ingredients (soy sauce, sugar, oyster sauce, chicken bouillon, dark soy sauce, corn syrup, Shaoxing wine, black pepper, water, and cornstarch).
Slice the green onions, separating the white and green parts. Mince the garlic and grate the ginger.
Heat 2 tbsp oil in a wok over medium-high heat. Add the ground beef, break it up, and saute 7-8 minutes until nicely browned.
Push the beef aside, add the remaining 1 tbsp oil with the white parts of the green onion, garlic, and ginger, and let the flavors infuse for 1 minute. Add the dried chilies (if using) and stir another 30 seconds.
Pour in the sauce and return the beef. Toss and simmer until the sauce thickens and glazes the beef.
Finish with the toasted sesame oil and the green parts of the green onion. Serve over hot rice, garnished with mild red chili.
A faster, cheaper ground-beef take on Mongolian beef (3-4 servings). From Aaron and Claire on Instagram; full recipe: https://aaronandclaire.com/mongolian-ground-beef/