Creating Japanese Miso Mushrooms is simple and straightforward if you follow these steps:

1. Prepare the Mushrooms: Clean the mushrooms by wiping them with a damp cloth. Slice them into bite-sized pieces if necessary.
2. Make the Miso Mixture: In a bowl, combine the white miso paste, soy sauce, sesame oil, minced garlic, minced ginger, rice vinegar, and sugar (if using). Mix until smooth.
3. Heat the Pan: In a large skillet or wok, heat a little sesame oil over medium-high heat until shimmering.
4. Cook the Mushrooms: Add the mushrooms to the skillet in a single layer. Sauté for about 5-7 minutes, stirring occasionally, until they are golden brown and tender.
5. Add the Miso Sauce: Pour the miso mixture over the cooked mushrooms. Stir well to coat all the mushrooms evenly.
6. Cook Until Glazed: Continue to cook for an additional 3-5 minutes, allowing the sauce to thicken slightly and coat the mushrooms.
7. Garnish: Remove from heat and garnish with sliced green onions and sesame seeds before serving.
8. Serve Immediately: Enjoy your Japanese Miso Mushrooms while they are warm for the best flavor.

Following these steps will help you create this incredible dish with ease!