In a fry pan over medium-high heat, brown ground beef and onion together until beef is browned and onion is translucent. Add spices and simmer together for another 10 minutes. Add vegetable juice and cornmeal to beef mixture and simmer for 15 minutes or until juice has cooked down and the mixture has thickened, stirring occasionally. While meat is simmering, heat beans on low in a small saucepan. To serve, layer beans, nacho meat, cheese, lettuce and other condiments over tortilla chips as desired.