In a large skillet, heat oil over medium-high heat. Pour egg into skillet. As the egg sets, lift edges, letting uncooked portion flow underneath. When egg is completely cooked, remove to a plate; set aside.
In the same skillet, cook turkey and onion over medium heat until meat is no longer pink. Stir in the rice, bean sprouts and cilantro. In a small bowl, whisk the remaining ingredients until blended; stir into skillet. Meanwhile, chop egg into small pieces; stir into skillet and heat through.