Drain the oil from the canned tuna and set aside.
Prepare boiled eggs and separate the whites from the yolks.
Julienne the cucumber and carrot, and lightly sauté the carrot.
Lay the seaweed on a sushi mat and evenly spread blanched cauliflower rice over it.
Add tuna, boiled egg, cucumber, and carrot on top.
Roll it up tightly.
Slice into bite-sized pieces.