Heat 1 tablespoon of olive oil in a large pot over medium-high heat. Add the shiitake mushrooms and sauté until browned and fragrant.
Add the remaining olive oil, minced garlic, and ginger. Sauté for another 1-2 minutes.
Add in the vegetable broth and soy sauce, stir to mix. Bring to a boil, add the frozen potstickers, half of the sliced sacllions, and the bok choy leaves. Bring the to a boil again, then reduce the heat and simmer for another 3-4 minutes or until the potstickers are heated through.
Stir in the toasted sesame oil and season with additional soy sauce and ground pepper.
Serve the soup hot, garnish with the remaining scallions and optional topping of your like to add color. Add a dash of sriracha, if desired.