Brown beef; break meat into small pieces while cooking. Drain.
Place meat in a big pot with lid. Add lentils, vegetables, water, salt, pepper, bouillon, vegetable juice, mushrooms, and Worcestershire sauce. Cook on high until it boils. Reduce heat to low, and cover. Simmer for about 1 1/2 to 2 hours, or until lentils are tender. Stir occasionally.
