Select saute setting on a 6-qt. electric pressure cooker and adjust for medium heat. Add 2 teaspoons oil. Sprinkle beef with salt and pepper. Brown meat in batches, adding oil as needed. Transfer meat to a bowl.
Add wine to cooker, stirring to loosen browned bits. Press cancel. Return beef to cooker; add the mushrooms, onion, broth and Worcestershire sauce. Lock lid; close the pressure-release valve. Adjust to pressure-cook on high for 15 minutes. Quick-release pressure.
Select saute setting and adjust for low heat; bring liquid to a boil. In a small bowl, mix cornstarch and water until smooth; gradually stir into beef mixture. Cook and stir until sauce is thickened, 1-2 minutes. Serve with mashed potatoes.
Test Kitchen tips
The next day, stir a little heavy cream or sour cream into leftover sauce and serve over pasta.
We use the saute feature to brown the beef for added flavor.