Pecan-Crusted Prime Rib with Horseradish Cream Sauce

Horseradish Cream Sauce (optional):

• 1          cup low-fat sour cream
• 1/4       cup horseradish, grated
• 1          tablespoon Dijon mustard
• 1/2       lemon, juice and zest only
• 2          tablespoons fresh chives, finely sliced
• kosher salt, to taste
• fresh black pepper, to taste

• 1          boneless prime rib roast (8-10 pounds)
• 1          tablespoon, plus 1/4 teaspoon, kosher salt
• 2          teaspoons fresh black pepper, plus additional for pecan topping
• 1          cup raw pecan pieces
• 3          tablespoons fresh rosemary, chopped
• 3          tablespoons fresh thyme, chopped
• 1/2       cup panko breadcrumbs
• 2          tablespoons unsalted butter
• 8          garlic cloves, divided
• 2          tablespoons Dijon mustard, divided

1. To make Horseradish Cream Sauce: In small bowl, combine sour cream, horseradish, mustard, lemon juice and zest, and fresh chives; add salt and pepper, to taste. Sauce can be prepared 1 day ahead of time and refrigerated.
2. Season prime rib with 1 tablespoon salt and pepper; let sit at room temperature 1 hour.
3. To make pecan topping: Heat oven to 325° F. In food processor, process pecans, rosemary, thyme, breadcrumbs, butter, 2 cloves garlic, 1 tablespoon mustard, remaining salt and pepper until combined. Set aside.
4. Cut small slits in fatty side of prime rib; stuff with remaining garlic. Rub remaining mustard over top of prime rib and apply pecan topping, making sure to press firm.
5. Transfer prime rib to roasting pan. Place rib roast in lower-third of oven, insert digital probe thermometer in middle and loosely cover top of prime rib with foil so pecans don’t burn. Cook 1 1/2 hours, remove foil and continue cooking until internal temperature reaches 120° F.
6. Allow prime rib to rest covered 30 minutes so juices can redistribute. Serve with Horseradish Cream Sauce, if desired.