Mix ground beef, bread crumbs, salt, pepper and eggs; shape into 8 oval patties, each about ¾ inch thick.
Cook patties in large skillet over medium heat, turning occasionally, until brown(about 10 minutes), drain.
Add onion, broth and mushrooms. Heat to boiling, reduce heat.
Cover and simmer until beef is done, about 10 minutes.
Remove patties; keep warm.
Heat onion mixture to boiling. Mix water and cornstarch; stir into onion mixture.
Boil and stir 1 minute.
Serve over patties.