1Heat the oil in a large saucepan over medium-high heat. Add the scallion whites, garlic, and ginger and cook, stirring, until fragrant for about 30 seconds.
2Add the pork and cook, breaking it up with a spoon, until browned and cooked through for about 8 minutes.
3Add the mushrooms and 1/2 teaspoon salt and cook, stirring frequently, until tender, about 3 minutes more.
4Add the broth, fish sauce, and 2 cups water to the saucepan and bring to a boil.
5Add the wonton wrappers, reduce heat, and simmer until tender, 1 to 2 minutes. Stir in the lime juice.
6Serve with the scallion greens, chilli peppers, cilantro, and lime wedges.