Season chicken breasts with your favorite taco seasoning and cook in a large skillet until well done.
Once chicken is cooked, remove from the skillet and add 2 cups of water and bring to a boil. Add contents from Knorr(R) Fiesta Sides(TM) - Yellow Rice in skillet and follow package directions.
Layer a large bowl with tortilla chips (optional), cooked chicken, Knorr(R) Fiesta Sides(TM) - Yellow Rice, corn, black beans, lettuce, tomato and cheddar cheese. Mix well and serve with sour cream or salsa if desired.