In a pot warm up the broth. Add onion, pepper, and garlic, stirring until the vegetables soften.
Add beef. Using a wooden spoon, gently break down the meat until cooked through.
Bring to a boil, reduce heat to a simmer, and cover for 20 minutes.
Top with cheese and cilantro if you like. Serve and enjoy the easiest homemade chili in the world!