Pre-heat the oven to 425° F, and grease a 9x13 baking dish.
Press the pie crust into the greased casserole dish, pressing it onto the sides and bottom of the dish.
Brown the ground beef in a large skillet, and drain the meat when browned.
Stir the corn, green pepper, onion, cornmeal, oregano, chili powder, salt, pepper, and tomato sauce into the ground beef.
Spread the meat mixture in the pastry lined baking dish.
Bake at 425° F for about 25 to 30 minutes.
Meanwhile, combine the egg, milk, salt, dry mustard, and Worcestershire sauce in a small mixing bowl.
Then mix the shredded cheese into the egg mixture.
Spread the cheesy mixture all over the top of the pie.
Top with the bacon crumbles and stuffed olives, if desired.
Bake an additional 5-10 minutes, or until the cheese melts completely.
Let stand 10 minutes before serving. Serve with sour cream, green onions, and/or cilantro, if desired.