In a large bowl, mix together ground beef, egg, bread crumbs, black pepper, salt, onion powder, garlic, and Worcestershire sauce. Form the mixture into thick patties.
Cook the Patties:
Heat oil in a large skillet over medium heat. Fry the patties along with the sliced onions until the patties are browned and onions are soft. Remove the patties to a plate and keep warm.
Make the Gravy:
Sprinkle flour over the onions and drippings in the skillet. Stir well, scraping the bits off the bottom. Gradually add beef broth, stirring continuously. Add salt and simmer over medium-low heat for about 5 minutes until the gravy thickens.
Finish Cooking:
Reduce heat to low, return patties to the skillet, cover, and simmer for another 15 minutes, letting the flavors meld.
Serve:
Plate the smothered hamburger steaks over mashed potatoes and pour extra gravy on top.
Serving Tip
Pair with steamed green beans or a side salad for a complete, classic comfort meal.
