Ingredients for 4 servings:
1. 1 tablespoon butter
2. 1 1/2 cups mushrooms, sliced
3. 1 tablespoon flour
4. 1/3 cup port wine
5. 1/4 cup shallot, minced
6. 1 tablespoon balsamic vinegar
7. 1 cup beef broth
8. 2 teaspoons Worcestershire sauce
9. 1 teaspoon tomato paste
10. 1/8 teaspoon dried rosemary
11. 1/2 teaspoon Dijon mustard
Directions:
1. In a medium skillet, melt the butter and saute the mushrooms for about 3 minutes, then stir in flour, combining well.
2. In another skillet, combine the wine, shallots and vinegar, boiling until thickk, about 3 minutes.
3. Reduce heat to medium. Add broth, Worcestershire, tomato paste and rosemary, cooking for 1 minute.
4. Add mushroom mixture and cook 3 minutes, stirring constantly, then add mustard to sauce.
5. Serve warm.