Preheat large Dutch oven or pot on medium-high heat and add oil. Add onion, garlic and bell pepper; saute for 7-8 minutes or until a bit golden brown, stirring occasionally. Remove into a small bowl and set aside.
Add ground turkey and ground beef, then cook for about 7-10 minutes, stirring and breaking into small pieces with spatula or meat masher constantly.
Add sauteed vegetables and tomato paste, stir until well combined. Then add diced tomatoes, tomato sauce, beef broth, cornmeal, chili powder, brown sugar, cumin, smoked paprika, oregano, salt and pepper. Stir well.
Cover with a lid and bring to a boil, then reduce heat to low and simmer for 25 minutes. I recommend to stir a few times to avoid chili burning on the bottom.
Turn off heat and let chili stand for 15 minutes. After stir chili and adjust salt to taste, if necessary. Serve hot with your favorite toppings and cornbread or dinner rolls.
Notes
Store: Refrigerate chili for up to 5 days in an airtight container.
Freeze: Make sure to cool chili completely and then freeze in an airtight container for up to 3 months. Thaw in the fridge overnight.
Reheat: Reheat desired amount in small pot by simmering on low heat. Cover and stir occasionally until warmed through.