Dice the potatoes, Spam, and onion into small cubes. Soak the diced potatoes in water.

Blanch the diced potatoes in boiling water for 2 minutes. Remove and set aside.

Blanch the diced Spam in the same boiling water for 10 seconds to remove excess salt and additives.

Heat 1 tbsp cooking oil and 1 tbsp sesame oil in a pan. Add the blanched potatoes and stir-fry over medium heat.

Add the diced onion to the pan and stir-fry until slightly softened.

Add the diced Spam to the pan and stir-fry together with the potatoes and onions.

Mix 2 tbsp soy sauce, 3-4 tbsp water, and 2 tbsp corn syrup. Pour the mixture into the pan and stir-fry until the liquid is reduced and absorbed.