Cook potatoes in boiling water to cover 10 minutes or until tender; drain carefully, leaving skins intact. Cover and leave at room temperature up to 2 hours, if desired.
Stir together butter and next 5 ingredients; pour butter mixture over potatoes, tossing gently to coat.
Note: Potatoes may be placed in the roasting pan with the beef tenderloin and baked. After removing the tenderloin, bake potatoes 5 to 10 more minutes or until tender.
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