Portabella mushroom burgers

Made portabella mushroom burgers last night. Both myself and my oldest daughter love them and quite frankly they taste better than a regular hamburger.
I started of by whisking the following ingredients in a bowl:

• 1/4 c. balsamic vinegar (use a good quality one)
• 2 tbs. olive oil
• 2 tbs. minced garlic
• 1/2 tsp dried basil and oregano
• cayenne pepper, salt, and pepper to taste

I remove the stems and the gills from the caps of 4 medium to large portabella mushrooms and placed them in the marinade. I toss to coat completely and let sit at room temperature for 10-15 minutes. While mushrooms are marinating, I toast hamburger buns with garlic Parmesan butter (softened butter, minced garlic, grated parmesan, pepper, and dried basil) and set aside until ready to plate.

Toasted parmesan garlic buns

I usually grill my mushrooms on my George Forman grill, but this time I broiled them in my toaster oven (love that thing). I placed the mushrooms on the rack gill side down and cooked for approx. 10-15 mins., turning once halfway through cooking and basting with marinade.
         **make sure to line the pan with foil to catch drips and make clean up easy.

Marinated and ready to cook

Once the mushrooms are cooked I topped with provolone cheese and let melt (I topped mine with goat cheese). Dress the sandwich just as you would a regular hamburger; i.e onion, tomato, lettuce, aioli, etc.

Cooked mushrooms topped with provolone and goat cheese

That's one good lookin "burger"!