In a pot of boiling water, cook pasta desired doneness. Drain, cool, and place in a mixing bowl.
In a skillet, over medium heat, cook chicken, onions, and bell peppers until no pink remains in chicken. Add the taco seasoning mix and water. Stir and bring to a boil, then reduce heat and simmer, uncovered, for ten minutes. Add meat mixture and cheeses to the pasta; toss gently. Add taco sauce and mix gently. Recipe makes eight servings.