Prepare the vegetables: slice potatoes into half-moons, chop green onion, and mince garlic.

Dice the Spam into large cubes.

Heat a pot with a small amount of cooking oil.

Stir-fry the potatoes over high heat until slightly golden.

Add Spam and stir-fry until golden and crispy.

Pour in the rice water and bring to a simmer over medium heat.

Add minced garlic, black pepper, and red pepper flakes.

Add soy sauce and let the stew boil over high heat.

Check if the potatoes are fully cooked by piercing them with a fork.

Add chopped green onion and bring the stew to a final boil over high heat.