Add ground beef to a large stock pot, and crumble the beef. Add chopped green pepper and onion. Cook on medium high, stirring occasionally, until beef is browned. Drain if needed
Once ground beef is cooked, add remainder of ingredients. Stir. Cover and let simmer for 20 - 25 minutes.
Add extra salt or pepper to taste. Top with green onions, avocado, cilantro, or onion.