Combine ground beef, breadcrumbs, chopped onion, garlic powder, Worcestershire sauce, salt, and pepper in a large bowl. Mix gently until just combined.

Form the mixture into oval-shaped patties about ¾ inch thick and set aside.

Heat skillet over medium-high heat, add oil, and sear patties for 4 minutes on each side until golden brown and cooked through.

Remove patties and whisk in flour to form a roux. Stir constantly for about a minute until light golden.

Slowly pour in beef broth while stirring until smooth. Cook until thickened, about 3-5 minutes.

Return patties to the skillet and let simmer for 5 minutes with gravy.

Serve on plates with gravy poured over, and garnish with chopped parsley.