Creating Japanese Dumpling Soup can be easy if you follow these simple steps:

1. Heat Oil: In a large pot, heat the vegetable oil over medium heat.
2. Sauté Aromatics: Add the chopped onion and sauté until translucent. Stir in the minced garlic and grated ginger, cooking for an additional minute until fragrant.
3. Add Broth and Water: Pour in the chicken or vegetable broth and water, bringing it to a gentle simmer.
4. Flavor the Broth: Stir in the soy sauce and miso paste until well combined.
5. Add Vegetables: Incorporate the sliced mushrooms, carrots, and baby spinach (or bok choy). Let it simmer for about 5 minutes.
6. Cook Dumplings: Gently add the frozen gyoza to the pot. Allow them to cook according to the package instructions, usually about 5-7 minutes.
7. Final Touches: Taste the broth and adjust seasoning if necessary. Add more soy sauce or miso for flavor.
8. Serve Hot: Ladle the soup into bowls, garnishing with sliced green onions and a drizzle of sesame oil.
9. Optional Heat: If you enjoy some spice, sprinkle chili flakes or add fresh chili slices to your bowl.

These steps will guide you in creating this incredible soup effortlessly.