In shallow bowl, combine flour, salt and pepper; mix well. Add round steak pieces to flour mixture; turn to coat both sides.
Spray large nonstick skillet with nonstick cooking spray. Heat over medium-high heat until hot. Add beef; cook 2 to 3 minutes on each side or until browned. Remove from skillet; cover to keep warm.
In 3 1/2 or 4-quart slow cooker, combine potatoes, carrots and onion; mix well. Add bay leaf. Place browned beef over vegetables.
In small bowl, combine 1 1/2 cups of the broth and Worcestershire sauce. Pour over beef. Cover; cook at low setting for 8 to 10 hours or until beef is tender.
With slotted spoon, remove beef and vegetables from slow cooker; place on serving platter. Cover to keep warm.
Pour liquid into medium saucepan; discard bay leaf. In small bowl, combine remaining broth and cornstarch; blend until smooth. Add to liquid in saucepan. Bring to a boil over medium-high heat, stirring constantly. Boil 1 minute. Serve sauce with beef and vegetables.