Marinated Grilled Balsamic Mushrooms

I love me some mushrooms & Pinterest.  Unfortunately my family does not.  They don't know what they are missing.  After years of abstaining, I am finally back on the mushroom bandwagon.  I made these as a small sidedish, but I bet they would be fabulous as a large mushroom cap in place of a burger too!

Ingredients:
1/2 tbsp Harissa (yeah I had never heard of this either, but it was in the ethnic section of my grocery store)
1 tbsp olive oil
2 tbsp balsamic vinegar
1 tsp oregano
8oz of baby portobella or shittake mushrooms sliced in half lengthwise
Pre-soaked skewer (I didn't use this)

Directions:

Preheat the oven to 350 (or you can grill them too). Whisk the harissa, olive oil, balsamic vinegar, and oregano together in a bowl.  Pour into ziploc, add mushrooms, and toss well to coat.  Roast for 10-12 minutes or grill 5 minutes per side.

Recipe obtained from: http://www.dinnersanddreams.net/2011/10/mushroom-skewers.html

*Update*
I also made these on the grill and they came out phenomenal.  I did not use the skewers.  I used the grill and just sprayed my grill skillet (like this one).  I wasn't timing them, but I just eyeballed it and when they looked ready I pulled them off.