Beef Tenderloin with Garlic Horseradish Cream

Name: Beef Tenderloin with Garlic Horseradish Cream
Ingredients: 1 head garlic (1/4 pound; about 2 1/2 inches in diameter), left intact; 1 teaspoon olive oil; 3/4 teaspoon salt; 2 cups heavy cream; 1/4 cup drained bottled horseradish; 1/8 teaspoon white pepper; 1 (3-pound) center-cut beef tenderloin roast, tied; 1/2 cup cracked black pepper; 2 teaspoons granulated beef bouillon; 2 teaspoons salt; 3/4 teaspoon cornstarch; 3/4 teaspoon dried oregano, crumbled; 3/4 teaspoon garlic powder; 3/4 teaspoon paprika (not hot); 1 tablespoon olive oil; a roasting pan with a rack; an instant-read thermometer