Take your chicken breast, make a foil envelope (to be placed in a steamer), add some ginger and garlic (reserve a little to put on top of the breast), put the breast in the envelope, add a drizzle of soy sauce and mirin, put in a thinly sliced spring onion on top and steam until just cooked. Remove, slice and place on a bed of rice. Pour some remaining sauce from the envelope over the top. Enjoy! Simple, clean Asian flavours.