Dredge beef in flour. Heat oil in large dutch oven; ad beef, browning on all sides. Add tomatoes, onion, salt and carrots. Combine water, molasses and vinegar, stir into beef mixture. Cover, reduce heat and simmer 2-1/2 hours or until meat is tender. Stir in raisins and ginger. Simmer an additional 30 minutes. Remove roast from pan and separate into bite size pieces and shred with 2 forks. Return shredded roast to pan and serve.