Preheat your oven to 400°F (200°C).
In a large oven-safe skillet, heat the vegetable oil over medium heat. Add the frozen dumplings in a single layer and cook for about 3-4 minutes until they start to brown on the bottom.
While the dumplings are browning, mix the chicken broth, soy sauce, garlic powder, onion powder, and sesame oil in a bowl.
Once the dumplings are browned, carefully pour the broth mixture over them in the skillet.
Transfer the skillet to the preheated oven and bake for 15-20 minutes, or until the dumplings are cooked through and the broth has reduced slightly.
Remove from the oven and let cool for a few minutes. Garnish with chopped green onions and sesame seeds before serving.