Prime Rib with Roasted Garlic and Horseradish Cream Sauce

THE MODERN PROPER
15Ingredients
20Minutes

Ingredients

US|METRIC
  • 5 pounds bone-in rib roast
  • 4 tablespoons coarse sea salt
  • 3 tablespoons freshly ground pepper
  • 1 teaspoon granulated garlic
  • 1 teaspoon mustard powder
  • 1 package au jus mix (Jonny's )
  • 1 teaspoon thyme (freshly chopped)
  • 2 cloves garlic (whole, heads)
  • 2 tablespoons olive oil
  • 1/2 cup heavy whipping cream (chilled)
  • 1/2 cup sour cream
  • 1/4 cup mayonnaise
  • 4 tablespoons horseradish sauce (prepared, more if you like it hot!)
  • 2 tablespoons fresh chives (chopped)
  • 1/2 teaspoon sea salt
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