Components: 1 (2 1/2 pound) center-cut beef tenderloin, cut,3/ 4 teaspoon black pepper,4 teaspoons butter,2 teaspoons cornstarch,12 ounces sliced cremini mushrooms,2 teaspoons dried thyme,6 garlic cloves, minced,1 cup less-sodium beef broth,1/ 2 cup port or other sweet red wine,1 1/4 teaspoons salt, divided,2 tablespoons water
Instructions: