Roast Prime Rib With Madeira Sauce And Horseradish Sauce

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Details

13 Ingredients

• 1 9- to 9 1/2-lb prime rib beef roast, excess fat trimmed
• 1 Tbsp olive oil
• 6 medium onions, peeled, quartered
• 2 1/2 cups canned beef broth
• 1 3/4 cups Madeira
• 1 1/4 cups dry red wine
• 4 large fresh thyme sprigs
• 4 large fresh parsley sprigs
• 3 large fresh rosemary sprigs
• 1 bay leaf
• 2 Tbsps (1/4 stick) butter, room temperature
• 2 Tbsps all purpose flour
• Horseradish Sauce