INGREDIENTS
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1 9-pound beef rib roast (about 4 ribs), meat cut from bone, meat and bone tied together with kitchen twine
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2-1/2 teaspoons kosher salt
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2 tablespoons Dijon mustard
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1 tablespoon minced garlic
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1/3 cup heavy cream
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1/3 cup prepared horseradish
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1/4 cup cognac
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1 can (14 ounces) low-sodium beef broth
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2 teaspoons whole pink peppercorns, coarsely crushed, plus more for garnish