01 -
In a large bowl, combine the ground beef, bread crumbs, grated Parmesan cheese, chopped onion, Worcestershire sauce, garlic powder, salt, and pepper. Use your hands to gently mix until all ingredients are evenly incorporated, being careful not to overmix.
02 -
Divide the meat mixture into four equal portions. Shape each portion into an oval patty about 3/4-inch thick, similar to the shape of a steak. Use your thumb to make a slight indent in the center of each patty to prevent it from puffing up during cooking.
03 -
Heat olive oil in a large skillet over medium heat. Once hot, add the patties and cook for 5-6 minutes on each side until nicely browned and almost cooked through. Transfer the patties to a plate and cover loosely with foil.
04 -
In the same skillet with the remaining drippings, add the sliced mushrooms. Sauté for 3-4 minutes until they release their moisture and begin to brown. Sprinkle the flour over the mushrooms and stir continuously for about 1 minute to cook the flour.
05 -
Gradually pour in the beef broth while whisking constantly to prevent lumps. Bring the mixture to a simmer and cook for 2-3 minutes until it starts to thicken, stirring occasionally.
06 -
Return the patties to the skillet, nestling them into the gravy. Reduce heat to low, cover the skillet, and simmer for 10-15 minutes until the patties are completely cooked through and the gravy has thickened to your liking. Garnish with fresh chopped parsley before serving.