In a large pot, heat the olive oil over medium heat. Add the chopped onion and bell pepper, and sauté until soft, about 5 minutes. Stir in the minced garlic and cook for an additional minute.

Brown the Meat

Add the ground beef to the pot. Cook, breaking it apart with a spoon, until browned, about 6-8 minutes.

Add the Remaining Ingredients

Stir in the diced tomatoes, kidney beans, chili powder, cumin, salt, black pepper, and water or broth. Mix well.

Simmer the Chili

Bring the chili to a boil, then reduce the heat to low. Cover and let it simmer for 30 minutes, stirring occasionally. Adjust the seasoning with hot sauce to taste.

Serve

Ladle the chili into bowls and enjoy! Optionally, top with cheese, sour cream, or green onions.