Boil or grill the chicken breast and cut it into bite-sized pieces.
Slice the cucumber into half-moon shapes.
Dice the avocado.
Julienne the carrot thinly.
Place the rice (brown or white) in a bowl.
Top the rice with chicken breast, cucumber, avocado, and carrot.
Mix together soy sauce, sesame oil, and lemon juice to make the sauce.
Drizzle the sauce over the ingredients and mix well before eating.