Heat oil in a Dutch oven or large pot over medium heat. Add onion, garlic, and bell pepper. Saute for 2-3 minutes, until tender. Sprinkle with cumin, chili powder, and red pepper flakes. Cook for another minute.
Add turkey to the pan and cook until browned, about 6-8 minutes, crumbling the meat as it cooks.
Stir broth, tomatoes, and tomato paste into the pot and bring it to a boil. Reduce to a simmer, add kidney beans, cover, and let simmer for about 25 minutes. Taste and season with salt, pepper, or additional chili powder as needed.
Serve with toppings and enjoy!