Creating Bobby Flay’s Ultimate Salisbury Steak can be accomplished with these straightforward steps:

1. Prepare the Beef Mixture: In a large mixing bowl, combine the ground beef, chopped onion, Worcestershire sauce, Dijon mustard, garlic powder, salt, pepper, breadcrumbs, and egg. Mix until well combined, then form the mixture into oval patties, about ½ inch thick.

2. Cook the Patties: Heat 1 tablespoon of olive oil in a large skillet over medium-high heat. Add the patties to the skillet and cook for about 3-4 minutes per side or until browned. Remove the patties and set them aside on a plate.

3. Sauté the Mushrooms: In the same skillet, add the remaining olive oil and the sliced mushrooms. Sauté for about 5 minutes until they are soft and browned.

4. Make the Gravy: Sprinkle the flour over the mushrooms and cook for an additional minute, stirring continuously. Gradually pour in the beef broth, whisking to prevent lumps. Allow the mixture to simmer for about 5 minutes until it thickens slightly.

5. Combine and Serve: Return the patties to the skillet, coating them with the mushroom gravy. Let them simmer for 5-10 minutes on low heat to absorb the flavors. Serve garnished with freshly chopped parsley.

With close attention to these detailed steps, you’ll create an incredible dish that everyone will love.