You are here: Home » Recipes » Roasted Beef Tenderloin Roasted Beef Tenderloin Recipe by Food & Culinary Professionals Dietetic Practice Group Yield 8 servings Prep 10 mins Cook 40 mins Slices of this savory beef, wedges of roasted red onion, and creamy mashed potatoes make a decadent trio. PrintEmail Ingredients 2 tablespoons prepared horseradish2 tablespoons mustard, stone ground or Dijon1/2 teaspoon kosher salt1/2 to 1 teaspoon black pepper, freshly ground3 -- garlic cloves1 large shallot, quartered1 tablespoon dried leaf thyme1 tablespoon olive oil1 -- (2-pound) beef tenderloin4 large red onions, quartered Instructions Preheat oven to 425F Process horseradish, mustard, salt and pepper in food processor or blender until smooth. Separately, mince garlic and shallots; combine with horseradish mixture to make the "seasoning rub." Place the trimmed tenderloin (small end tucked) in a roasting pan sprayed with nonstick cooking spray. Spread or pat seasoning rub on the tenderloin. Insert meat thermometer in thickest part of the meat. Cover and roast for 20 minutes. Baste with meat juices; roast, uncovered, for 10 to 20 minutes to desired doneness. Recipe by Barbara J. Pyper, MS, RD, CD, FHCFA, FCSI. Reprinted with permission from John Wiley & Sons, Inc. The American Dietetic Association's Cooking Healthy Across America (Wiley, 2004).