Start by thinly slicing the lemons. You can remove any seeds if necessary.

In a bowl, combine equal parts granulated sugar and water to create a sugar syrup. You can add lemon zest for extra flavor if desired.

Preheat your air fryer to a low temperature, around 250°F (120°C).

Dip each lemon slice into the sugar syrup, ensuring it's coated evenly.

Place the coated lemon slices in a single layer in the air fryer basket. Make sure they are not overlapping.

Air fry the lemon slices at the low temperature for about 10-15 minutes, checking periodically. The time may vary depending on your air fryer model and the thickness of the lemon slices.

The candied lemons are done when they become slightly translucent and the sugar syrup has crystallized on them.

Remove the candied lemon slices from the air fryer and let them cool on a wire rack. They will harden as they cool.

Once completely cooled, you can use the candied lemon slices as a garnish for desserts, cocktails, or other dishes.