INGREDIENTS
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1 beef rib eye roast (5 lb.), 2 or 3 ribs
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2 tsp. whole black peppercorns, cracked
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4 tsp. fresh thyme leaves, divided
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1 cup BREAKSTONE'S or KNUDSEN GREEK Style Sour Cream & Nonfat Yogurt
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1/4 cup KRAFT Prepared Horseradish
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1 tsp. sugar
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1 Tbsp. butter
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1 sweet onion, very thinly sliced
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1/2 lb. sliced fresh mushrooms
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1 Tbsp. flour
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1 cup fat-free reduced-sodium beef broth
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1 Tbsp. GREY POUPON Dijon Mustard