Preheat oven to 425 degrees.
If using raw chicken, season chicken with Italian seasoning, salt & pepper and cook thoroughly.
Heat the butter over medium heat and sauté all of your vegetables, tomatoes, peppers and chiles until tender.
Add in cooked chicken and mix ingredients together.
Cook your noodles according to the package instructions.
Mix your noodles into your chicken and vegetable mixture until thoroughly combined.
Transfer noodles and chicken mixture to a 9x13 casserole dish.
Top with shredded cheese.
Bake uncovered for 15 - 20 minutes until cheese is melted and everything is heated through.
Allow to cool for a few minutes before serving.