Roast Prime Rib of Beef with Horseradish Crust (Tyler Florence) Recipe - Details, Calories, Nutritio

Ingredients

• 1 bone in prime rib beef roast , 3 ribs , about 6 lb
• 5 garlic cloves, smashed
• 1/4 cup grated fresh or prepared horseradish
• leaves from 2 fresh rosemary sprigs
• leaves from 4 fresh thyme sprigs
• 1/2 cup kosher salt
• 1/4 cup freshly ground black pepper
• 1/2 cup extra-virgin olive oil
• 1/2 cup dry white wine
• 1 tbsp all-purpose flour
• 2 cups canned chicken or beef broth
• 1 1/2 cups heavy cream
• 1 sprig fresh thyme
• 2 garlic cloves, chopped
• 1/2 tsp ground nutmeg
• butter
• 2 russet potatoes, peeled and cut into 1/8-inch thick slices
• salt and freshly ground black pepper
• 1/2 cup grated parmesan, plus more for broiling
• 6 tbsp butter
• 3 tbsp balsamic vinegar
• 1/2 cup honey
• 1/2 bunch fresh thyme
• 4 red onions, halved