Creating the Classic Salisbury Steak Recipe is simple if you follow these steps:

1. In a large bowl, combine the ground beef, egg, bread crumbs, chopped onion, minced garlic, Worcestershire sauce, salt, and pepper. Mix until well combined.
2. Shape the mixture into oval patties, about 1 inch thick.
3. In a large skillet, heat the olive oil over medium heat. Add the patties and cook for 5-6 minutes on each side or until browned. Remove the patties from the skillet and set them aside.
4. In the same skillet, add sliced mushrooms and sauté until they soften, about 3-5 minutes.
5. Pour in the beef broth and scrape the bottom of the skillet to release any browned bits. Bring to a simmer.
6. If you prefer a thicker gravy, mix the cornstarch with a bit of cold water to create a slurry. Stir it into the simmering broth, allowing it to thicken slightly.
7. Return the patties to the skillet, covering them with gravy. Reduce the heat to low, cover, and let it simmer for about 10 minutes.
8. Check for seasoning and adjust salt and pepper as necessary.
9. If desired, garnish with fresh parsley before serving.

By following these steps, you will create an incredible meal that your family will love.