"This easy beef stroganoff recipe is one of our family's favorite weeknight meals! We use tenderloin tips to make this fast weeknight meal with a creamy sauce, sautéed mushrooms and onions, perfect over buttered rice..."
INGREDIENTS
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1.25 lbs tenderloin tips or stir fry beef/sirloin/ribeye
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1 onion, thinly sliced
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12 oz portobello mushooms, sliced
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4 T butter, divided
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1/4 c flour
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1/4 c sherry
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1 cups beef stock
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1 tsp dry mustard
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1 1/2 cups sour cream
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buttered rice, for serving