These Roasted Mushrooms are amazing! The savory onions, the hint of spicy kick, the full flavored soy sauce and balsamic, all mingle together on your tongue to tell you these are not just boring normal mushrooms, these are something special!
Place all ingredients in a ziptop plastic bag. Close the top, and shake to combine. Marinate mushrooms in the fridge for 30-45 minutes.
Preheat oven to 350 degrees F.
Cover a large baking sheet with parchment paper, aluminum foil, or a Silpat. Pour mushrooms and any sauce on the prepared baking sheet. Roast in oven for 10-15 minutes until mushrooms start to brown and sizzle. Remove from oven and let rest 5 minutes.