Step 1

Heat oil in a medium saucepan over medium-high; add garlic and ginger and cook until fragrant, 30 seconds. Add broth, 2 cups water, cilantro stems, and 1 tablespoon soy sauce. Bring to a boil, then reduce heat to low and simmer, partially covered, 20 minutes. Remove and discard cilantro. Meanwhile, in a medium bowl, combine sausage, remaining 1 tablespoon soy sauce, and cilantro leaves. Roll mixture into 1-inch meatballs.

Step 2

Return broth mixture to a simmer; stir in bok choy, then remove from heat. Gently add meatballs. Cover; let stand until meatballs are puffed and cooked through, 5 to 6 minutes. Drop wonton wrappers into soup, one at a time, stirring occasionally to prevent sticking. Divide soup among 4 bowls; serve with chili-garlic sauce.