Lightly dust maitake mushrooms with potato starch.
Heat vegan butter in a frying pan, and cook the mushrooms on medium-low heat for 5 minutes.Cooking Tip: Use a spatula or a potato masher to flatten the mushrooms. Keep pressing down on them the entire time they're cooking. This way, you get a more even sear and crisp on them. After 5 minutes, flip the mushrooms over and cook for an additional 3 minutes, until browned and crispy on the edges.
Once the mushrooms are seared, reduce the heat to low, and add soy sauce, mirin and black pepper. Stir and coat both sides of the mushrooms with the sauce.
Plate and garnish with sesame seeds and parsley (optional). Enjoy!
