Prepare spam, cheese, and green onion or chives. Chop the green onion or chives finely.

Cut slits into the spam, leaving about 2-3 cm at the bottom uncut.

Place the slit spam into an oven or air fryer and cook at 180°C (356°F) for 18 minutes.

While the spam is cooking, cut the cheese slices into quarters.

Remove the cooked spam and insert the quartered cheese slices into the slits.

Sprinkle the chopped green onion or chives over the spam.

Return the spam to the oven or air fryer and cook at 185°C (365°F) for 5 minutes.