Charred Beef Tenderloin With Cacio e Pepe Toasted Barley and Watercress Pesto Recipe

Ingredients (9)

• 2/3 cup pearl barley, rinsed
• Kosher salt
• 1 packed cup mixed bitter greens, such as watercress, spinach, and arugula
• 1 clove garlic, roughly chopped
• 3 tablespoons chopped walnuts
• 3 tablespoons extra-virgin olie oil, divided
• 3 tablespoons grated Pecorino Romano, divided
• 12 ounces beef tenderloin
• Freshly ground black pepper