Salisbury Steak

1 pound ground sirloin beef
2 Tbs butter
2 Tbs flour
2 cups beef broth
1 small onion
mushrooms
salt and pepper to taste

Dice onion and mix with ground beef. Shape into oval patties about 1 inch thick. Cook over medium/high heat until juices run clear. Add a bit of salt and pepper and set aside.
Add butter to the pan and saute mushrooms until tender. Add the flour to mushrooms and than add beef broth. Whisk until well blended than add the beef patties and simmer until the gravy begins to thicken.