Season the chicken with the lemon pepper and then it can either be cooked in the skillet, boiled, or grilled if not already done. Once it is fully cooked cut the chicken into cube pieces.
Pour the lemon juice over the chicken and let it aside in a dish for a few minutes while preparing the rice.
Boil the rice per the package instructions.
Cook the broccoli per the package instructions.
In a large bowl, combine the chicken, mayo, sour cream, soup, broccoli, cooked rice, and cooked chicken, mix well.
In a 9 x 13 baking dish, pour 1/2 of the mixture on the bottom, then top with 2 cups of cheese (1 cup of each type of cheese).
Add the remaining mixture on top and then an additional 2 cups of cheese and dash of chili powder.
Bake at 350°F for 15-20 minutes or until the cheese is nice and melted.
Notes
If you prefer less cheese, you can use 2 cups instead of 4 cups. It works out great either way!