In a large bowl, mix together the Beef, Breadcrumbs, Onion, Italian Seasoning, Ketchu, Colonel Pabst Worcestershire Sauce, Egg and Salt and Pepper.
Form the meat mixture into 4 equal sized oval shaped patties
Heat the Olive Oil in a large pan over medium-high heat
Place the patties in the pan in a single layer. Cook for 5-6 minutes on each side or until golden brown and cooked through.
Remove the meat from the pan. Place on a plate and cover with foil.
Melt the Butter in the pan. Add the Onion and Muchrooms and season with Salt and Pepper.
Cook for 3-5 minutes or until vegetables have softened. Whisk in the Beef Broth, Ketchup and Colonel Pabst Worcestershire Sauce and bring to a simmer.
In a small bowl, mix the cornstarch with 2 Tbsp of Cold Water.
Add the Cornstarch mixture to the pan and whisk until smooth. Cook 1-2 minutes or until sauce has just thickened.
Add the Meat back to the pan and spoon the gravy over the top. Sprinkle with Parsley and serve.