Wash the lemon and dab it dry with a kitchen towel.
Using a sharp knife or a mandoline cutter, slice the lemon into 2mm to 3mm thick slices. Remove and discard the seeds.
Fill a wide pan with the water.
Add sugar and place it on a stove.
Turn on the heat to a medium flame and stir the sugar to dissolve it.
Once the sugar is dissolved, add the lemon slices, one at a time. Make sure the slices are not overlapped.
Turn the heat to low and cover the pan.
Let the lemon slices simmer in the sugar syrup for 15 minutes.
Turn them over and cook for another 15 to 25 minutes until the centers are completely translucent.
Turn off the heat and remove the lemon slices onto a parchment-lined tray. Place each slice apart from one another.
Let the candied lemon slices dry overnight, uncovered before consuming or using for decoration.
To store the candied slices, place each slice between parchment squares. The slices are best stored in the refrigerator. Keep them in an airtight container.