Combine chicken and lime juice in medium bowl. Cover and marinate in refrigerator 10 minutes.
Cook chicken and lime juice in large nonstick skillet over medium heat, stirring occasionally, 5 minutes or until chicken is thoroughly cooked. Stir in water and Knorr® Fiesta Sides™ - Mexican Rice. Bring to a boil over high heat. Reduce heat to low and simmer, stirring occasionally, 5 minutes. Let stand 2 minutes. Garnish, if desired, with finely chopped fresh cilantro.