01 -
In a large bowl, gently combine the ground beef, breadcrumbs, Parmesan, egg, garlic powder, salt, and pepper. Mix only until the mixture holds together without overworking.
02 -
Divide the mixture and form 4 to 6 oval-shaped patties of even thickness.
03 -
Heat 1 tablespoon olive oil in a large skillet over medium-high heat. Sear patties for 3 to 4 minutes per side until deep golden brown. Transfer patties to a plate and set aside.
04 -
Add remaining olive oil to the skillet. Sauté sliced mushrooms and onions over medium heat for 5 minutes, stirring occasionally, until soft and golden.
05 -
Deglaze the pan with beef broth, scraping any browned bits. Stir in Worcestershire sauce. If using, combine flour with a small amount of water to make a slurry, then whisk into the pan. Simmer for 5 to 7 minutes until slightly thickened.
06 -
Return patties to the skillet, nestling them in the mushroom gravy. Spoon sauce over each patty, cover, and simmer on low heat for 10 minutes until fully cooked and flavors meld.
07 -
Transfer patties to plates and drizzle generously with mushroom gravy. Pair with mashed potatoes and steamed vegetables if desired.