1 Tbsp. + 1 tsp. horseradish (more if you want it hotter)
1 Tbsp. + 1 tsp. Dijon mustard
1/4 tsp. coarsely ground pepper
How to make it
Heat oven to 325 degrees. Prepare Herb Rub. Place beef, fat side up, on rack in shallow roasting pan. Rub garlic over beef. Spread mustard over top and sides of beef. Spread herb rub over top and sides of beef. Insert thermometer so tip is in center of thickest part of beef and does not touch the bone. Roast uncovered, 1 1/2 - 2 hours, or until thermometer reads 140 degrees (medium doneness; 130 for rare; 150 for well done). Cover beef loosely with foil tent and let stand about 15 minutes, or until thermometer reads 140 degrees. Serve beef with Horseradish sauce.
Mix all ingredients.
Mix all ingredients together. Cover and refrigerate at least 1 hour to blend flavors.