Brown the beef and onion in large stewpot (or saucepan if you’re planning to be it all in a crock pot). Add the remaining ingredients and simmer for at least 1 hour, or until ready to serve. If you use a crockpot, add the browned beef and onion, then the rest of the ingredients. Cook on low for 6 hours. Serve with grated cheese, sour cream, chopped green onions, diced tomatoes, and crushed tortilla chips or tortilla strips---or in individual bags of Fritos!