Preheat oven to 450 degrees. Slice peppers and remove the seeds/core. Place on a greased baking dish, cut side up, and bake for 20-30 minutes.
Heat a large pan on the stove over medium/high heat. Spray with cooking spray
Add minced garlic and cook for one minute. Add diced onion and cook until soft and translucent, about 3-4 minutes
Add ground chicken, breaking it apart while cooking. Once slightly broken up, season with the seasonings. Cook almost through, until almost all the pink is gone
Add tomato sauce, broth, ketchup and stir to combine. Allow chicken to cook completely
Add in cream cheese and stir in until melted. Add in cheddar cheese and stir until melted
Once the peppers are cooked, stuff the chicken mixture into the peppers and enjoy!