01 - Heat a large pot or Dutch oven over medium heat. Add ground beef and cook, breaking apart with a spoon, until browned and no longer pink, about 5-7 minutes. Drain excess fat if needed.
02 - Add chopped onion, bell pepper, and jalapeño to the pot. Sauté for 5 minutes until vegetables begin to soften.
03 - Stir in minced garlic and cook for 1 minute until fragrant, being careful not to burn it.
04 - Add chili powder, cumin, smoked paprika, oregano, black pepper, salt, and cayenne. Stir thoroughly to coat meat and vegetables evenly with spices.
05 - Mix in tomato paste, diced tomatoes with juices, kidney beans, and beef broth. Stir until well combined.
06 - Bring mixture to a simmer, then reduce heat to low. Cover and cook for 45 minutes, stirring occasionally to prevent sticking.
07 - Taste and adjust seasoning as needed. Serve hot, garnished with cilantro, sour cream, shredded cheddar cheese, and sliced green onions if desired.