Mushroom Appetizers

Description
A great appetizer, tasty. A nice blend of flavors You may make the Mushroom fill ahead and freeze it. I usually split it into 4 bags so I can make only a dozen at a time. Thaw from frozen and continue to make the bread nappies.

Ingredients

 * 3 tablespoons butter
 * 1 cup sweet onions, chopped fine
 * 2 cups mushrooms, chopped finely
 * 1 cup mozzarella cheese, grated
 * ¼ cup Parmesan cheese
 * 1 teaspoon parsley flakes
 * 1 large egg, beaten
 * ½ teaspoon oregano
 * salt and pepper
 * 12 slices square bread, crusts removed (white or whole wheat, I prefer the whole wheat)
 * ⅓ cup butter, softened
 * 3 slices Kraft processed cheese slices

Directions

 * 1) Melt butter in a large fry pan and add the onions and mushrooms, saute until soft.
 * 2) Add mozzarella, Parmesan, parsley, egg,saltand pepper, cook for 1 minute and remove from heat.
 * 3) Roll each crustless slice of bread to flatten it, butter each piece and cut each slice into 4 square pieces.
 * 4) Press bread pieces, the buttered side down, into a tiny muffin tins.
 * 5) Fill with mushroom mixture (about 1½ tsp to each tartlet).
 * 6) Cut the 3 cheese slices into 16 pieces so you will have 48 pieces and put a piece on top of each tartlet.
 * 7) Bake in 350°F oven for 20 to 25 minutes.