In a medium bowl, combine the beef, egg, chili sauce, onion, bread crumbs and salt; mix well. Shape mixture into 4 patties, about 1/2-inch thick.
Coat a large nonstick skillet with nonstick cooking spray; heat over medium-high heat. Add patties; cook 3 minutes per side; drain if necessary. Add potatoes.
In a medium bowl, mix the water and flour until creamy. Stir in the tomatoes, soup, and Worcestershire sauce; mix well. Pour mixture over patties and potatoes; bring to a boil. Reduce heat to medium-low; cover and simmer 15-20 minutes or until patties are thoroughly cooked and potatoes are fork-tender, turning patties and stirring once during cooking time.