Beef Stroganoff

1 lb beef tenderloin or sirloin steak
2 tsp butter
2 tablespoons ketchup
1/2 lb mushrooms, sliced
1 medium onion, minced
1 can beef broth
1 clove garlic
salt
3 tsp flour
1 cup sour cream
noodles

Cut meat across grain in 1/2" strips, about 1 1/2" long. Melt butter in skillet and add mushrooms and onion. Cook and stir until onion is tender. Remove from skillet. In same skillet cook meat until brown. Reserving 1/3 cup broth, stir in remaining broth, ketchup, garlic and salt. Cover, simmer 15 minutes.

Blend reserved broth and flour, stir into meat mixture. Add mushrooms and onion. Heat to boiling, stirring constantly. Boil and stir 1 minute. Reduce heat and stir in sour cream, heat. Serve over noodles.