These happened on the fly tonight and they turned out to be pretty good. I bought the almond meal at the Wildwood Country Store. It was $1.99 a bag which is a great price.
1 small package baby bella's
1/2 cup almond meal flour
1/2 cup shredded parmesan
1/2 cup shredded Havarti
1/2 cup shredded pepper jack
1 tsp. salt
1/4 onion, chopped finely
2 cloves garlic, pressed
Preheat oven to 400. Saute the onion and garlic in olive oil. Transfer to a bowl then add the almond meal, cheeses and salt. Scoop the middle out of the mushrooms making a hole for the filling. Press the filling down into each mushroom. Place in an ovenproof dish and bake for 25 minutes.