Coat a large pot or Dutch oven with nonstick cooking spray and place it over MEDIUM heat. Add the ground turkey and cook, stirring to break up the meat, for about 5 minutes or until fully cooked. Drain off any excess grease and return the pot to the heat.
Add the onion, celery, bell pepper, jalapeño, and garlic. Cook, stirring occasionally, for 5 minutes, or until the veggies have softened slightly just crisp-tender.)
Sprinkle the chili powder, cumin, oregano, smoked paprika, black pepper, and red pepper flakes (if using) over the mixture and cook, stirring frequently, until the meat and veggies have been well coated and have absorbed some of the spices, about 2 to 3 minutes.
Add the diced tomatoes, tomato sauce, tomato paste, broth, beans, and bay leaves. Bring the chili to a simmer over MEDIUM-HIGH heat, then reduce the heat to LOW, cover, and simmer for 40 to 45 minutes. Stir the chili occasionally as it simmers.
Remove and discard bay leaves before serving with your toppings of choice.