In a medium saucepan, bring the vegetable broth to a boil. Once boiling, add the lime leaves, galangal and lemongrass and boil for 5 minutes. Add the mushrooms, thin soy sauce, Thai chiles, lime juice, tomatoes, onions and tofu, if desired, and boil for another 5 minutes. Garnish with cilantro and green onions.
For extra spice, add more Thai chile peppers.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.