Cut beef into 6 serving pieces. Spray 12-inch skillet with cooking spray; heat over medium-high heat. Sprinkle beef with seasoned salt. Cook in skillet 6 to 8 minutes, turning once, until brown.
In 4- to 5-quart slow cooker, layer potatoes, carrots, beef and onion. In medium bowl, mix tomatoes and gravy; spoon over mixture in slow cooker.
Cover; cook on Low heat setting 7 to 8 hours. Sprinkle with parsley.
This recipe was tested in slow cookers with heating elements in the side and bottom of the cooker, not in cookers that stand only on a heated base. For slow cookers with just a heated base, follow the manufacturer’s directions for layering ingredients and choosing a temperature.