Slice hard-cooked eggs in half lengthwise, and carefully remove yolks. Mash yolks in a medium mixing bowl; stir in minced mushrooms, melted butter, Worcestershire sauce, hot sauce, salt, and pepper, mixing until well blended.
Stuff whites with yolk mixture; press cut sides of stuffed eggs together, pressing gently to reassemble each egg. Place eggs in a lightly greased 10- x 6- x 2- inch baking dish. Arrange whole mushrooms over top. Sprinkle with half of bacon and cheese. Pour sauce over top of casserole. Sprinkle with remaining bacon.
Bake at 350° for 30 minutes or until bubbly. Remove from oven, and garnish with chopped parsley. Spoon onto serving plates, and serve warm.