Marinate chicken in 1 tablespoon soy sauce, ½ teaspoon sesame oil, 1 garlic clove, and minced green onion, white part only. Rest for 5 minutes in marinade.
Slice onion thinly
In a medium mixing bowl, beat eggs till fluffy. Add to the bowl, soy sauce, sesame oil, garlic, carrot, onion, drained and sliced water chestnuts, and bean sprouts. Toss to combine
Heat a wok on medium high heat. Add 1 tablespoon vegetable oil to wok. Cooked chicken until done. Remove from wok and set aside to cool for 5 minutes. Add chicken to vegetable and egg mixture and toss to combine.
Add 1 tablespoon oil to wok. Place a scoop of egg foo yung mixture in the hot wok and cook for 2 minutes on one side. Flip and continue cooking until egg is set, about 2-3 minutes more. Continue until all mixture is made into pancakes.