Place chicken stock in a large saucepan or Dutch oven over medium-high heat.
Cut white parts of green onions into 1-inch pieces and add to broth.
Add garlic clove.
Thinly slice 1 inch ginger (or 1 teaspoon ground) and add to stock.
Add 1 tablespoon soy sauce, vinegar, brown sugar and ½ teaspoon salt.
Bring mixture to a boil, stirring occasionally.
Place pork in a bowl.
Finely slice remaining green parts of green onions. Set aside 3 tablespoons for garnish.
Add remaining onions to the bowl; grate in remaining 2-inch piece of ginger.
Add remaining soy sauce, remaining salt, sesame oil, and cornstarch to the bowl; mix until well combined.
Form mixture into 1-inch balls and add to broth.
Alternatively, use a small spoon to drop heaping teaspoons full of meat into broth.
Reduce heat to a simmer; cook 5 minutes.
Add wonton wrappers, bok choy, and additional soy sauce to taste.
Cook 8 minutes, stirring occasionally.
Serve with reserved green onions and hot sauce or chili crisp if desired.
