Wash the cucumber and slice it diagonally.
Julienne the carrot and onion.
Put the rice in a bowl.
Drain the oil from the canned tuna and place it on top of the rice.
Add cucumber, carrot, and onion on top of the rice.
Add soy sauce, gochujang, and sesame oil.
Top with a fried egg.
Mix all the ingredients well and enjoy.