In a large mixing bowl, combine the mushrooms, olive oil, balsamic vinegar, soy sauce, chopped garlic, thyme, salt, and pepper. Toss everything together until the mushrooms are evenly coated.
Spread the mushroom mixture in a single layer on a baking sheet.
Roast in the preheated oven for about 20 minutes, stirring halfway through, until the mushrooms are tender and browned.
Details: This simple roasted mushroom recipe delivers rich, savory flavor with the tang of balsamic vinegar and the earthiness of thyme. Perfect as a side dish or added to your favorite pasta, salad, or grain bowl.