Green beans with mushrooms and onions

Well I'm back on the paleo wagon and my problem is coming up with sides.  Today I scored some baby bella mushrooms on sale and found a bag of haricot verts in the freezer, and amazingly had some onions sitting around, so off I went.  And the results were tasty!

Preheat oven to 400 degrees

• 1 24-ounce bag of extra fine french green beans (if you have frozen, just let them thaw and use paper towel or a salad spinner to get rid of the excess moisture)
• 12 ounces of baby bella mushrooms, halved
• 1 red onion, thinly sliced
• 1/4 cup olive oil
• 2-3 teaspoons garlic powder
• 2-3 teaspoons onion powder
• 2-3 teaspoon fine sea salt

In a large baking dish combine all ingredients.  Cook at 400 degrees for 25-30 minutes or until mushrooms are tender.  Adjust seasoning as necessary.

Serves 6