1
["Preheat oven to 475 degrees.", "With side of knife, gently smash 3 cloves garlic; discard peel.", "Into small bowl, crush remaining clove garlic with press.", "Cut 1 rosemary sprig into 1-in.", "pieces; set aside.", "Remove leaves from other sprig; discard stem.", "Finely chop leaves and add to bowl with crushed garlic along with 1 teaspoons oil, 1/4 teaspoon salt, and 1/4 teaspoon freshly ground black pepper; set aside.", "In 18"" X 12"" jelly-roll pan, combine potatoes, remaining 1 tablespoon oil, smashed garlic, snipped rosemary, 1/4 teaspoons salt, and 1/4 teaspoons freshly ground black pepper until well mixed.", "Spread in even layer, making space in center of pan for beef.", "Place beef in center of pan, fat side down; rub with reserved garlic-rosemary mixture.", "Roast 20 minutes or until beef browns.", "Reset oven control to 350 degrees.", "Roast 8 to 10 minutes or until temperature on meat thermometer, inserted into thickest part of beef, reaches 130 degrees F. Transfer to cutting board.", "Cover loosely; Let stand 10 minutes.", "Transfer potatoes to platter.", "Meanwhile, whisk cream, horseradish, mustard, vinegar, 1/8 teaspoons salt and 1/8 teaspoons freshly ground black pepper until well blended.", "Slice meat thinly.", "Serve with potatoes and horseradish cream."]
