01 - Heat vegetable oil in a large pot over medium heat. Add diced onion and red bell pepper; cook for 4-5 minutes until softened.
02 - Stir in minced garlic and jalapeño; cook for 1 minute until fragrant.
03 - Add ground beef and brown thoroughly, breaking apart with a spoon, about 6-8 minutes. Drain excess fat if needed.
04 - Mix in chili powder, cumin, smoked paprika, cayenne, oregano, salt, and black pepper. Cook for 1 minute to release aromas.
05 - Add tomato paste and cook, stirring, for 1 minute to deepen flavor.
06 - Pour in diced tomatoes with juices, beef broth, and kidney beans; stir thoroughly to combine.
07 - Bring mixture to a simmer, reduce heat to low, cover, and cook for 40 minutes, stirring occasionally.
08 - Taste and adjust seasoning as desired. For thicker texture, simmer uncovered an additional 10 minutes.
09 - Ladle chili into bowls and garnish with optional toppings such as sour cream, shredded cheddar, cilantro, or green onions.