Flank Steak With Creamy Mushroom Sauce

From Cooking Light - sounds yummy!

• Ready In: 40 mins
• Serves: 4

Ingredients

• 1 (1 lb)  flank steak, trimmed
• 1⁄2 teaspoon salt
• 1⁄2 teaspoon fresh ground black pepper
• 1⁄2 cup shallot
• 4  ounces  gourmet mushrooms, most mushrooms will work though
• 1⁄3 cup water
• 2  teaspoons Dijon mustard
• 1  tablespoon Worcestershire sauce
• 1⁄2 teaspoon  chopped fresh thyme
• 1⁄4 cup nonfat sour cream

Directions

1. Preheat broiler.
2. Sprinkle steak evenly with salt and pepper. Place steak on a broiler pan coated with cooking spray. Broil 6 minutes on each side or until desired degree of doneness; let stand 10 minutes.
3. Heat a large nonstick skillet over medium heat. Coat pan with cooking spray. Add shallots to pan; cook 3 minutes, stirring occasionally. Add mushrooms to pan. Cover and cook 4 minutes or until mushrooms are tender, stirring occasionally. Stir in 1/3 cup water, mustard, worcestershire, and thyme. Cover and cook 2 minutes. Remove from heat; stir in sour cream.
4. Cut steak diagonally across grain into thin slices. Serve with mushroom sauce.