Season the chicken with the salt and pepper. Heat 2 tablespoons of the olive oil on medium heat. Once hot, add the chicken and sear on each side until golden brown, remove from the pan and set aside. Note, the chicken does not need to be fully cooked.
In the same pan the chicken was cooked in, add the remaining olive oil, red and yellow peppers, onion, and garlic. Cook just until the vegetables begin to soften.
Stir in the diced tomatoes, Italian seasoning, and chicken broth. Return the chicken to the pan and bring to a low simmer. Cover and cook for about 20 minutes or until the chicken is cooked through and very tender.
Sprinkle fresh parsley on top and serve.