- Vegetable cooking spray
- 1 (1 1/2) pound boneless beef sirloin steak or top round steak, 3/4-inch thick, thinly sliced
- 1 (8 ounce) package sliced mushrooms
- 1 large onion, thinly sliced
- 1/4 cup balsamic vinegar
- 1 cup Prego® Traditional Italian Sauce or Marinara Italian Sauce
- 1/2 cup crumbled Gorgonzola or feta cheese
- Hot mashed potatoes
- Spray a 12-inch skillet with the cooking spray and heat over medium-high heat for 1 minute. Add the beef in 2 batches and cook until it's well browned, stirring often. Remove the beef from the skillet. Pour off any fat.
- Reduce the heat to medium. Add the mushrooms and onion to the skillet and cook for 5 minutes or until the vegetables are tender. Stir in the vinegar and cook for 2 minutes.
- Stir the sauce in the skillet and heat to a boil. Return the beef to the skillet. Top with the cheese. Cook and stir until the cheese is melted. Serve with the potatoes.