Simmer Peeled Onions In Salt Water. When Cool, Cut Off Caps And Scoop Out Carefully. Saute The Scooped Out Onions In Butter, When Clear Add Sliced Mushrooms, Pepper, Garlic And Meat. When Cooled Mix With The Egg And Thicken With Bread Crumbs In A Bowl. Fill The Onions With The Stuffing, And Put In Baking Pan, Add Stock Pour Some Stock Over Onions. Sprinkle With Cheese, And Bake For 25 Minutes.