Make a batter with the egg and a bit of flour. Coat the chicken pieces with it and grill at about 160C for ten minutes
Meanwhile prepare the sauce in a wok mixing vinegar, sugar, pineapple juice, soy sauce. Bring them to a boil. Mix three tablespoonful of pineapple juice with the corn flour. Add to boiling mixture and it will thicken quickly.
Reserve sauce until needed.
Heat up a tablespoonful of sesame oil. Stir fry chopped green beans and carrot batons. Add pineapple chunks. And finally add the previously grilled chicken.
Add sauce and make sure everything coated. Serve with extra veg or noodles or rice
