Beef Stroganoff - cooking recipe

Ingredients

2 c. filet of beef, sliced
1 Tbsp. flour
5 Tbsp. butter, divided
2 c. beef stock
1/2 pt. sour cream
2 Tbsp. tomato paste
3 Tbsp. grated onion

Preparation

Sprinkle beef with salt and pepper and put in refrigerator for two hours. Saute grated onion in 3 tablespoons butter. Add beef and cook quickly. Set aside. Melt 2 tablespoons butter and add 1 tablespoon flour. Stir and add beef stock. Cook until thick. Boil for 2 minutes. Add sour cream alternately with tomato paste. Stir constantly and do not boil. Add beef and heat a few minutes. Serve with noodles.