Mixed Mushroom Foil Bake
Umami-rich mushrooms steamed in a miso-mirin sauce with minimal cleanup
Why This Recipe Works
Steaming mushrooms in a sealed foil pouch preserves their moisture while concentrating the savory miso and mirin sauce. This technique requires very little active work and makes cleanup a breeze since everything cooks in a single packet.
Instructions
Preheat the oven to 350°F. Prepare a sheet of aluminum foil approximately 12 by 18 inches and place it on a baking sheet.
Whisk the mirin, soy sauce, and miso paste in a small bowl until the miso is fully dissolved and the sauce is smooth.
Arrange the onion, mushrooms, and garlic in the center of the foil and drizzle with the melted butter. Bring the long sides of the foil together and fold them over several times to seal the top, then crimp one end shut to create a secure pouch.
Pour the miso sauce into the open end of the pouch, then fold and crimp that end tightly to prevent any steam or liquid from escaping.
Bake until the mushrooms are tender and have released their juices, about 30 to 35 minutes.
Carefully open the foil—watch for the hot steam—and garnish with chopped scallions and a squeeze of fresh lemon juice. Serve hot as is or over steamed short-grain rice.
🍽️ Complete the Meal
Frequently Asked Questions
Can I freeze this recipe?
Refrigerate leftovers for up to 3 days.
What substitutions can I make?
- vegan butter: neutral oil