Combine chicken, soup, tomatoes, peas, sour cream, taco seasoning, and salt and pepper.

Mix well together and pour half of mixture into casserole dish.

Cover with tortilla chips and cheese.

Layer with the remaining chicken mixture and cover with remaining chips and cheese.

Cover with aluminum foil and bake for 25 minutes at 375°F.

Remove foil and cover with cheese and bake for another 10 minutes.