Herb-Crusted Prime Rib with Horseradish Cream

INGREDIENTS

• 1 Tbs. dried whole thyme leaves
• 1 1/2 Tbs. toasted onion powder
• 1 1/2 Tbs. roasted garlic powder
• 3 Tbs. kosher salt
• 3 Tbs. freshly ground five-pepper blend
• 1 Tbs. Hungarian paprika
• 3-rib standing beef rib roast, about 5 lb., tied with kitchen string
• 2 Tbs. olive oil
• 3/4 cup heavy cream
• 1 cup sour cream
• Juice of 1 lemon
• Kosher salt and freshly ground pepper, to taste
• 1/2 cup freshly grated or prepared horseradish