Coat a large skillet with cooking spray, and place over medium-high heat until hot. Add mushrooms and chives; cover and cook 5 minutes or until mushrooms release moisture and darken (do not stir).

Place flour in a small bowl. Gradually add beef broth, stirring with a wire whisk until blended. Add flour mixture, water, and remaining ingredients to skillet; bring to a boil. Reduce heat, and simmer, uncovered, 10 minutes or until thickened, stirring constantly.