In a large pot, heat 2 tablespoons of oil over medium heat. Once shimmering, add 1 diced onion and sauté until translucent, about 5 minutes.
Stir in 2 minced garlic cloves, 1 diced red bell pepper, and 1 diced green bell pepper. Cook for another 5 minutes until peppers are tender.
Add 1 pound of ground beef to the pot. Cook for about 7-10 minutes, breaking it apart as it browns.
Sprinkle in 1 tablespoon of ground cumin, 1 tablespoon of chili powder, and 1 teaspoon each of cayenne pepper, salt, and black pepper. Stir for another minute.
Pour in 1 can of diced tomatoes (14 oz), 2 cups of drained kidney beans, 1 tablespoon of tomato paste, and 1 cup of beef broth. Stir well to combine.
Bring the mixture to a gentle simmer, cover the pot, reduce the heat to low, and cook for 60 minutes, stirring occasionally.
After simmering, taste your Chilli Con Carne and adjust seasoning if necessary. Serve hot.
Notes
For better results, use fresh vegetables and taste your Chilli Con Carne before serving to adjust spices as needed.