Put the chicken in a pan and pour over cold water to cover. Tip the soya beans into a steamer. Bring the pan to a gentle simmer, then cook the chicken for 8 mins with the beans above.
Meanwhile, mix the dressing ingredients in a large bowl. When the chicken is cooked, slice and toss in the dressing along with the beans, carrot, onions, tomatoes, coriander and basil. Mix really well, pile onto the salad leaves and sprinkle with the sesame seeds.