Mix all ingredients except butter, olive oil and onion. Add 1 tsp of Worcestershire Sauce. Shape into 6 equal sized patties. Heat skillet add olive oil and butter. Fry patties about 3-4 minutes on each side and remove from pan. Add onions and fry until they are browned. Add brown gravy mix - enough to make 2 cups and add patties back into pan. Simmer on low for another 15 minutes.