What you will need:
12 oz. boneless beef sirloin
8 oz. sour cream
2 TBS all purpose flour
1/2 cup water
2 tsp beef bouillon
1/4 tsp black pepper
2 cup sliced mushrooms
1/2 cup chopped onion
1 clove garlic, minced
2 TBS butter/margarine
2 cups cooked egg noodles

Directions:
1) Trim fat from meet and slice thinly across grain into bite size strips.
2) In small bowl, stir together sour cream and flour. Stir in water, bouillon, and pepper. Set aside.
3) In large skillet, cook and stir meat, mushrooms, onion, and garlic in hot butter over medium-high heat for 5 minutes or until meat is done. Drain off fat.
4) Stir sour cream mixture into meat mixture in skillet. Cook and stir until thickened and bubbly. Cook and stir for 1 minute more. Serve over cooked noodles.


...Better Homes & Gardens Cookbook