Spicy Grilled Beef Tenderloin | America's Test Kitchen

Ingredients

• 4 teaspoons pepper
• 1 tablespoon dry mustard
• 1 tablespoon salt
• 1 1/2 teaspoons cayenne pepper
• 6 tablespoons olive oil
• 5 - 6 pound beef tenderloin , trimmed, patted dry, tail tucked underneath and roast tied with kitchen twine (see below)
• 1/2 cup prepared horseradish (see note)
• 1/2 cup sour cream
• 1 tablespoon lemon juice
• 1 garlic clove , minced
• 1 tablespoon finely chopped fresh chives