Carla's Cheeseburger Pie

1lb. Ground beef and

1 deep dish pie crust
1 can mushroom soup
1 med. onion (optional)
½  cup Bread crumbs
Soya sauce to taste

Cheese Topping
1 egg
¼ cup Milk
½ tsp each salt, dry mustard, Worcestershire sauce
2 cups Shredded cheddar

Brown ground beef.  Add mushroom soup, bread crumbs and soy sauce. Put in raw pie crust.
Top with the cheese topping mixture.
Bake at 425ºF for 30 minutes