In a wok, heat oil over high heat.
Saute garlic and ginger for 1 min, add ground pork, stirring and breaking into pieces (about 3-5 mins), add scallions and continue to cooking until almost done
Add stock and bring to simmer. Add mushrooms
Taste and season with salt, pepper, and red pepper flakes until desired flavor and heat.
Add soy sauce, black vinegar, and shaoxing wine. Taste and adjust accordingly
Turn off heat and add the sesame oil
Serve and garnish with scallions