In a large skillet over medium-high heat, brown the ground beef until no longer pink, breaking it apart with a wooden spoon.
Drain any excess fat from the skillet and transfer the cooked beef into the basin of your slow cooker.
Add the kidney beans, tomato puree, diced red bell pepper, and chopped yellow onion to the beef.
Pour in the beef broth, then sprinkle the chili powder, smoked paprika, ground cumin, sea salt, black pepper, and minced garlic over the top.
Stir the mixture thoroughly to ensure the spices are evenly distributed throughout the liquid.
Secure the lid and cook on the low setting for 6 to 8 hours, allowing the smoky flavors to develop and intensify.
Give the chili a final stir before portioning into bowls and enjoying while hot.