01 -
Coat a 6-quart oval slow cooker with a spritz of cooking spray. Lay the mushrooms and onions in as the first layer.
02 -
Grab a bowl and mix together the ground beef, egg, steak seasoning, 1 tablespoon Worcestershire, breadcrumbs, parsley, and dried onion flakes until it's all blended together.
03 -
Shape the mixture into 4-6 thin oval patties. Don't stack them—spread them out evenly in the slow cooker.
04 -
Whisk 2 cups beef broth with 2 tablespoons Worcestershire, 2 tablespoons cornstarch, and black pepper. Once smooth, pour it gently over the patties. Cover and cook on high for 4 hours.
05 -
Take the Salisbury steaks out of the slow cooker when cooking is complete.
06 -
Mix 1 tablespoon cornstarch with 2 tablespoons water in a small bowl. Stir the mix into the remaining gravy until it thickens up.
07 -
Top each Salisbury steak with the onion mushroom gravy. Serve on mashed potatoes or egg noodles. Dig in!