
In a large bowl combine soup, mayonnaise and Worcestershire sauce. Stir in chicken, broccoli and onion. Transfer to a greased 9x13 baking dish. Sprinkle with cheese. Cover with foil and bake at 375 F for 20 minutes.
I added the sour cream in with the soup, mayo and Worcestershire sauce. Then only brushed the biscuits with the beaten egg and salt mixture.