Add rice and water to the rice cooker and switch on the appliance.
Cut the chicken breast vertically from the top to the middle on both sides. Do not cut through.
Season the chicken with a batch of sesame teriyaki sauce and set aside for half an hour.
Take out the chicken breasts and pat dry.
In a large frying pan or wok, heat the cooking oil over medium-high heat. Add chicken and cook until both sides are lightly brown.
Pour the marinade sauce into the pan or wok and continue cooking until the chicken is through cooked and the sauce reaches a simmer and thickens.
Heat the cooking oil in a wok over the medium-high level. Stir-fry the broccoli until done. Seasoned with salt.
When serve, place rice on the plate and the chicken on top of the rice. Garnish with finely sliced green onions and lemon juice.