Wash the spinach thoroughly and blanch it in boiling water.
Remove excess water from the blanched spinach, then cut it into bite-sized pieces.
Lightly sauté the spinach in a pan with some oil.
Add Dongwon spicy tuna and stir-fry together.
Add 20g of cheese, lower the heat, and let it melt.
Once all the ingredients are well combined, it's ready to serve.