Preheat oven at 425 dF.
In a mixing bowl, combine all ingredients except for the mushrooms until well incorporated.
Put a good mound of stuffing into each mushroom cap and place on a shallow baking dish.
Sprinkle the tops with freshly grated mozarella and bake in the oven for at least 20 mins. or until the cheese has melted and the top golden.
Recipe from: http://www.nibbledish.com/people/kimmallari/recipes/crab-quadruple-cheese-stuffed-baby-bellas
Changes were made. http://creativecommons.org/licenses/by-sa/3.0/