01 -
In a large bowl, combine ground beef, panko breadcrumbs, Dijon mustard, ketchup, Worcestershire sauce, onion powder, garlic powder, and the egg. Gently mix until fully blended using your hands.
02 -
Scoop the mixture into equal portions and shape each into oval patties. Set aside.
03 -
Heat oil in a large skillet over medium-high heat. Add the patties and sliced onions. Cook until patties are browned and fully cooked through, with no pink juices, approximately 4-5 minutes per side. Remove patties and set aside.
04 -
To the skillet drippings, stir in flour and cook for 2–3 minutes to form a roux. Gradually whisk in beef broth until smooth and thickened. If drippings are insufficient, start with butter instead. Return the patties to the skillet and simmer with gravy until heated through and thickened.
05 -
Plate the patties with brown gravy and onions. Serve immediately, ideally over mashed potatoes or white rice.