Cut the stem off of your large Portabella Mushrooms.
Stuff inside of the mushroom with feta cheese and minced garlic to taste
Top with a slice of mozzarella, I also cut some smaller pieces to fill in the sides.
Drizzle with olive oil and then season to taste with salt, pepper, and steak seasoning.
Fire up your grill to medium heat and place the mushrooms on the upper rack.
Allow the Cheese Stuffed Portabella Mushrooms to cook until cheese is fully melted,
I cooked mine for about 25 minutes.
Serve and enjoy!