Prepare all of the ingredients. Preheat oven to 400deg.
In a sauce pan over medium-high heat, add oil. Then add tomato paste and seasonings, stirring to combine. Whisk in chicken broth until sauce is smooth and creamy. Reduce heat and simmer.
In a large bowl, combine peppers, chicken, onion and garlic. Add to a 13x9 baking dish. Pour sauce over top. Top with cheese and parsley. Place in oven and bake for 30 minutes.