Mix gochujang 1, red pepper powder 0.5, sugar 0.5, soy sauce 2, sesame oil 1, sesame seeds well to make sauce.
On top of the rice, add lettuce (or perilla leaves), canned tuna, egg, sauce, sesame seeds, and drizzle with sesame oil.
*How to make microwave soft-boiled egg: In a microwave-safe bowl, add enough water, crack one egg and break the yolk, cover with a lid, and microwave for 1 minute and 30 seconds to 2 minutes in 30-second intervals.