Beef Stroganoff

1.5 pounds beef boneless top loin steak
Hot cooked noodles
1.5 cups beef broth
2 Tbsp. ketchup
1 medium onion
.5 pound mushrooms
3 Tbsp. flour
1 cup sour cream or plain yogurt

1) Cut up beef. Cook meet on skillet with olive oil for 8 to 10 minutes. While beef is cooking heat water for noodles.
2) Reserve 1/3 cup beef broth. Stir in the remaining broth, ketchup, and garlic into beef. Heat to boiling over high. Once mixture is boiling reduce heat just enough so mixture bubbles gently. Cover and cook about 10 minutes or until beef is tender.
3) While beef is cooking, peel and chop the onion and cut the mushrooms into slices. Finish preparing noodles.
4) Stir the onion and mushrooms into the beef mixture. Cover and cook about 5 minutes until onion is tender.
5) Shake the reserved 1/3 cup beef broth and the flour into a tightly covered container. Gradually stir the mixtrue into beef mixture. Heat to boiling over high heat, stirring constantly. Continue boiling 1 minute, stirring constantly, until thickened. Reduce heat just enough so mixture bubbles gently.
6) Stir in the sour cream. Cook until hot, but do not heat to boiling or the mixture will curdle. Serve over noodles.