Flank Steak with Shiitake Mushroom Sauce

Ingredients

• Steak:
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 1 (1-pound) flank steak, trimmed
• Cooking spray
• Sauce:
• 1/2 cup chopped onion
• 1 garlic clove, minced
• 2 cups thinly sliced shiitake mushroom caps (about 1/2 pound mushrooms)
• 1 cup less-sodium beef broth
• 1/3 cup dry white wine
• 1 tablespoon balsamic vinegar
• 1/2 cup minced green onions

Preparation

1. Preheat broiler.
2. To prepare steak, sprinkle salt and pepper evenly over both sides of steak. Place steak on a broiler pan coated with cooking spray; broil 5 minutes on each side or until desired degree of doneness. Remove the steak from oven; loosely cover with foil.
3. To prepare sauce, heat a large nonstick skillet over medium-high heat. Coat pan with cooking spray. Add 1/2 cup onion and garlic; sauté 2 minutes. Add mushrooms; sauté for 4 minutes. Add broth, wine, and vinegar. Bring to a boil; reduce heat to medium, and cook until reduced to 1 1/4 cups (about 6 minutes). Add green onions, and cook for 1 minute.
4. Slice steak diagonally across the grain into 1/4-inch slices. Serve steak with mushroom sauce.