Beef Stroganoff

6 oz fresh mushrooms, sliced
1 onion (chopped)
1/4 cup butter
2 pounds ground beef
1/4 cups flour
1 tsp salt
2 cups beef broth
1 cup sour cream
1 (12oz) pkg egg noodles, cooked and drained

Sautee mushrooms and onions in 2 TBSP butter until soft and remove from pan.
Add addtional butter or margarine to the pan and melt.
Add beef and cook until browned.
Add flour and salt and stir well.
Add beef broth and cook until slightly thickened.
Add mushrooms and onions, then sour cream.
Heat to simmer.
Do not boil.
Serve over cooked egg noodles.