Cut your choice of mushrooms into bitesize pieces (I used 100 g maitake mushrooms, 200 g enoki mushrooms and 50 g fresh shiitake mushrooms). Heat a pan over medium and add 1 tsp olive oil. Once hot, add 2 cloves garlic (minced) and the mushrooms. Stir fry until lightly golden and the garlic fragrance fills the air.
Mix 1 tbsp Japanese soy sauce (koikuchi shoyu), ½ tbsp sake, 1 tsp yellow miso paste (awase) and 1 tsp mirin in a small bowl until smooth.
Sprinkle the mushrooms with ¼ tsp salt and mix, then pour the sauce into the pan and mix until everything is evenly coated. Cover the pan with a lid and reduce the heat to medium-low. Steam for 4 minutes.
Remove the lid and turn off the heat. Add 10 g butter and ground black pepper, mix until the butter melts and creates a glossy coating.
Divide 2 ptns cooked Japanese short-grain rice into serving bowls and arrange the mushroom mixture on top. Drizzle with toasted sesame oil and top with finely chopped green onions and crispy fried onion. Enjoy!
Notes
Use a mix of mushroom types for the best texture and umami flavor.
Always trim and discard the tough ends of enoki mushrooms before cooking.
For a vegan version, replace butter with a plant-based alternative.