Roasted New York Strip Steak with Port Wine Mustard Sauce

INGREDIENTS

• 1 whole New York strip, about 5 pounds, well trimmed of excess fat and silverskin, trimmings reserved
• Kosher salt
• Salt
• 4 tablespoons unsalted butter, cut into pieces
• Freshly ground white pepper
• 1 cup port wine
• 1 cup heavy cream
• 2 tablespoons grainy Meaux mustard or smooth Dijon mustard
• Olive oil
• Freshly ground black pepper
• 1 cup beef stock, veal stock, or chicken stock
• 1 tablespoon minced shallot