Step 1

Whisk together the balsamic vinegar, olive oil, garlic powder, black pepper and salt in a shallow baking dish.

Step 2

Remove the stems and gills from the mushrooms.  Add them to the baking dish and flip them to coat them in the marinade mixture.  Let the mushrooms marinade for at least 5 minutes.

Step 3

Preheat a grill over medium high heat (approximately 400 degrees F).  Brush the grill grates with an oil to prevent the mushrooms from sticking to the grill.  Remove the mushrooms from the marinade and shake off any excess marinade.  Place them on the grill on direct heat.  Cook for 3-4 minutes per side until the mushrooms are a deep golden brown color.

Step 4

Serve the mushrooms topped with the fresh parsley.  Enjoy!