1 pounds beef sirloin tips, cut into bite-sized pieces
1 sliced onion
8 ounces sliced mushrooms
1 tablespoon of olive oil
1 tablespoon of Worcestershire sauce
1/4 cup dry red wine, plus a dash for deglazing
2.5 cups of beef broth
Salt and pepper to taste
2 tablespoons of cornstarch mixed with ¼ cup of cold water