Method:
Heat a large soup pot over medium heat until hot. Add olive or peanut oil and swirl to coat bottom, then add garlic and ginger. Stir until very fragrant and starting to soften, no more than 2 minutes. Add frozen vegetables, stirring occasionally until almost defrosted, about 3 minutes. Add broth and turn heat to high.
Once soup begins to boil, add soy sauce, vinegar and roasted sesame chili oil. Lower heat to medium and then carefully slide potstickers off of a large cooking spoon into the soup, a few at a time. Simmer on medium for 4 to 5 minutes, until potstickers are done. Remove soup from heat immediately, stir in green onions and serve. Garnish each serving with chiles, if you like.