Breast, cut into small cubes. In a bowl, mix the cornstarch, egg yolk, 2 tsp sugar, whole soy sauce, pepper, seasoning. Mix the marinade with the meat and marinate for 15-20 minutes. Drain the marinade into a separate dish, to be postponed. Heat the wok over high heat. The chicken fry parties. Pour the oil, carefully add the chicken, spread with a spatula into a single layer on bottom of wok. To fry without disturbing for 1 minute, then stir and cook for another 1.5 minutes. Reduce the heat and cook stirring another 2 minutes until the beautiful brown chicken. Add pineapple, pepper, onion, remaining marinade, remaining 1 tsp sugar. Cook for another 10 minutes, stirring constantly. Garnish with the top of the sliced green onions.