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Cut meat diagonally into thin slices.
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Melt margarine in large skillet.
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Saute mushrooms, onion and garlic over medium heat 5-6 minutes, stirring occasionally.
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Stir meat into skillet, cook over medium heat until meat is browned and most liquid is evaporated.
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Stir in consomme. Simmer, covered, until meat is tender (about 15 minutes).
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Shake wine and flour in tightly covered container; stir gradualy into meat mixture.
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Heat to boiling, stirring constantly. Boil and stir 1 minute.
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Stir in catsup, mustard and sour cream; heat through. Do no boil.