- Prepare the Steaks:
- In a large bowl, combine the ground beef, breadcrumbs, milk, egg, chopped onion, minced garlic, Worcestershire sauce, mustard powder, salt, and pepper. Mix well until all ingredients are evenly incorporated.
- Shape the mixture into 4-6 oval-shaped patties.
- Cook the Steaks:
- Heat the vegetable oil in a large skillet over medium-high heat.
- Add the patties to the skillet and cook for about 4-5 minutes on each side, or until they are browned and cooked through. Remove the patties from the skillet and set them aside.
- Make the Gravy:
- In the same skillet, add the butter and let it melt.
- Add the sliced onion and mushrooms, and cook until they are softened, about 5-7 minutes.
- Sprinkle the flour over the onions and mushrooms, and stir well to combine. Cook for another 1-2 minutes to remove the raw flour taste.
- Gradually pour in the beef broth, stirring constantly to prevent lumps.
- Add the Worcestershire sauce and Dijon mustard. Stir well and bring the mixture to a simmer.
- Cook the gravy for about 5-7 minutes, or until it thickens. Season with salt and pepper to taste.
- Combine and Serve:
- Return the cooked patties to the skillet, spooning some of the gravy over them.
- Reduce the heat to low and let the patties simmer in the gravy for about 10 minutes, allowing the flavors to meld together.
- Serve:
- Serve the Salisbury steaks hot, topped with the rich onion and mushroom gravy.
Enjoy your mouthwatering Salisbury steak!
