Preparation

Step 1:
In a large mixing bowl, add the ground beef, breadcrumbs, egg, finely chopped onion, garlic powder, Worcestershire sauce, and salt and pepper. Using your hands or a spoon, mix the ingredients thoroughly until well combined.

Step 2:
Divide the mixture into four equal portions and shape each into a patty, approximately 3/4 inch thick. These patties will form the base of your Salisbury steak.

Step 3:
In a large skillet, heat a drizzle of oil over medium-high heat. Add the patties and cook for 5-6 minutes per side, until they are nicely browned and cooked through. Remove the patties from the skillet and set them aside on a plate.

Making the Mushroom Gravy

Step 4:
In the same skillet, add the butter and melt over medium heat. Once melted, add the sliced mushrooms and cook for about 5 minutes, stirring frequently, until the mushrooms are softened and browned.

Step 5:
Sprinkle the flour over the mushrooms in the skillet and stir well to coat the mushrooms evenly. Allow the flour to cook for about 1 minute to remove the raw flour taste.

Step 6:
Gradually add the beef broth, whisking constantly to ensure a smooth consistency. Scrape up any browned bits from the bottom of the skillet to infuse extra flavor into the gravy.

Step 7:
Add the Worcestershire sauce to the skillet, stirring to combine. Allow the gravy to simmer for 3-5 minutes or until it reaches a thick, smooth consistency. Season with salt and pepper to taste.

Step 8:
Return the Salisbury steak patties to the skillet, nestling them into the mushroom gravy. Spoon the gravy over the patties and let everything simmer together for another 5 minutes to blend flavors thoroughly.

Step 9:
Remove the skillet from the heat and garnish the dish with freshly chopped parsley. Serve the Salisbury steak warm with mashed potatoes or a side of your choice.