Beef Tenderloin with Horseradish-Chive Sauce

Ingredients:

• 1 (2-pound) beef tenderloin, trimmed
• 1 tablespoon olive oil
• 1 1/2 teaspoons coarsely ground black pepper
• 3/4 teaspoon kosher salt
• 2/3 cup light sour cream
• 2 tablespoons chopped fresh chives
• 3 tablespoons prepared horseradish
• 1 teaspoon fresh lemon juice
• 1 teaspoon Dijon mustard
• 1/8 teaspoon kosher salt

Source