Drain the oil from the tuna using a strainer and set aside.
Mash 1kg of tofu and stir-fry until the moisture evaporates.
Separate half of the tofu, add the sauce ingredients, and stir-fry.
Mix the remaining half of the tofu with rice.
Julienne the zucchini and stir-fry in avocado oil with salt.
Shred the cabbage and stir-fry with tuna, avocado oil, oyster sauce, and pepper.
Portion into lunch boxes and refrigerate.