Preheat your oven to 400°F (200°C).
In a bowl, combine the balsamic vinegar, garlic, herbs and water or broth and set aside while quartering the mushrooms.
Add mushrooms and ensure they’re well coated.
Spread mushrooms out on a parchment-lined baking tray in a single layer.
Bake for 20–25 minutes, stirring once halfway through, until tender and slightly caramelized.
The result is deep, savory and slightly tangy, without any added oil.