Demi-glace substitute

1. Simmer the beef broth and butter in a saucepan over medium-low heat until it is reduced by half. Add arrowroot mixture, stirring slowly. Simmer and reduce slightly again, until mixture is smooth and rich. If too thick — this should not be gravy consistency — add vinegar and stir.

2. Makes about 1 cup.

3. Per 2-tablespoon serving: 20 calories, 67% calories from fat, 1.5 g fat, 1 g saturated fat, 5 mg cholesterol, 1 g carbohydrates, 1 g protein, 35 mg sodium, 0 g fiber