Heat the olive oil in a large heavy-bottomed pot over medium-high heat.
Add the ground beef to the pot and cook until browned, using a wooden spoon to break the meat into small crumbles.
Stir in the diced onion and red bell pepper, sautéing for 5 minutes until the vegetables are softened and translucent.
Add the minced garlic, chili powder, cumin, sea salt, and black pepper, stirring constantly for 1 minute to toast the spices and release their aroma.
Pour in the tomato puree, beef bone broth, and the rinsed kidney beans, stirring well to combine all ingredients.
Bring the mixture to a gentle boil, then reduce the heat to low and cover the pot.
Simmer for 15 to 20 minutes, stirring occasionally, until the chili has thickened and the flavors are deeply integrated.
Serve hot in a bowl, optionally garnished with fresh herbs if desired.