Salisbury Steak with Mushrooms

Combine ground beef, bread crumbs, chopped onion, egg, salt, and black pepper in a bowl until evenly mixed.

Shape beef mixture into 4 patties, about 3/4 inch thick.

Fry patties in a large skillet over medium heat until browned on both sides, about 10 minutes.

Add beef broth, onion, and mushrooms; bring to a boil.

Reduce heat to low, cover, and simmer until patties are no longer pink in the center, about 10 minutes more.

Transfer patties to a platter and keep warm.

Bring onion mixture to a boil.

Mix cornstarch and water in a small bowl; stir into onion mixture.

Cook and stir until onion gravy is thickened, about 1 minute.

Pour over patties to serve.