In a large Dutch oven or soup kettle, bring water to boil. Add potatoes, carrots, onion and seasonings; return to a boil. Reduce heat; cover and simmer for 10 minutes.
Meanwhile, in a small bowl, combine the bread crumbs, egg and Worcestershire sauce. Crumble beef over mixture and mix well.
Shape into 1-in. balls; add to Dutch oven along with sweet potatoes and parsnips. Bring to a boil. Reduce heat; cover and simmer for 15 minutes or until vegetables are tender.
Discard bay leaf. Stir in peas. Combine flour, cold water and browning sauce if desired until smooth; gradually stir into stew. Bring to a boil; cook and stir for 2 minutes or until thickened. Yield: 6 servings.