Brown meat - Heat an 8 quart stock pot or Dutch oven to med-hi. Add oil and saute roast until brown. Stir and brown on all sides of roast. Remove meat to a platter.Cook vegetables - To remaining oil in pot, add onions and carrots. Cover and cook until the onion is soft, about 5 minutes. Add beef and and juices back to the pan.Simmer - Add salt, pepper, bay leaf, diced tomatoes and tomato juice to the pan and bring to a boil over high heat. Reduce the heat to medium-low and simmer for 1 hour. Add the potatoes and stir. Simmer until the beef and the potatoes are tender, about 20 minutes. Add corn and green beans, cook 5 minutes.Remove bay leaf. Ladle into bowls and eat immediately.