In a large mixing bowl, mix together chicken broth, water, chicken flavored rice & vermicelli, diced onion, fire-roasted diced tomatoes, chopped green chiles, cumin, chili powder, and cayenne pepper. Stir it well.
Add your cubed chicken breasts to the bowl and stir to coat with spices and broth.
Transfer mixture into a greased 9x13 inch baking dish spreading chicken pieces out.
Cover the baking dish tightly with aluminum foil to trap moisture.
Bake in the oven for 45 minutes to cook chicken and soak rice.
Remove foil and bake an additional 10 minutes to brown the top and make bubbly. Then let rest for 5 minutes before serving.
Notes
Serve hot topped with a little sour cream or fresh cilantro for extra flavor.