In a medium bowl, whisk together the beef broth, half and half, cornstarch, Worcestershire sauce, garlic, Dijon, salt, and pepper.
1¼ cups low-sodium beef broth, ½ cup half-and-half, 2 tablespoons cornstarch, 1 tablespoon Worcestershire sauce, 1 teaspoon minced garlic, 1 teaspoon Dijon mustard, ½ teaspoon kosher salt, ½ teaspoon ground black pepper