Step 1

Place mushrooms and onion in a 3-qt. slow cooker. Sprinkle beef with salt and pepper. In a large skillet, heat oil over medium-high heat; brown meat. Transfer meat to slow cooker.

Step 2

Add wine to skillet, stirring to loosen browned bits from pan. Stir in broth and Worcestershire sauce; pour over meat. Cook, covered, on low 6-8 hours or until meat is tender.

Step 3

In a small bowl, mix cornstarch and water until smooth; gradually stir into slow cooker. Cook, covered, on high 15-30 minutes or until gravy is thickened. Serve with mashed potatoes.