Wash, dry and thinly slice citrus fruit.
Heat water in a saucepan over high heat.
Once water comes to a boil, add lemon slices.
Boil lemon slices for 10 minutes, stirring occasionally. Remove from heat.
In a separate saucepan, combine ½ cup water with 1 cup sugar and mix well.
Heat sugar and water over medium heat, stirring frequently and heating until sugar is no longer grainy and begins to bubble. Liquid will go from cloudy to clear.
Transfer lemon slices from the pan of boiling water to the pan with the syrup water and simmer gently for 20 minutes, allowing the slices to bubble and boil.
Use a fork to gently flip slices occasionally while they are cooking.
Add a piece of parchment paper to a baking sheet.
Remove slices from the pan using a fork or tongs and let excess sugar mixture drip off each slice; place slices onto the baking sheet lined with parchment paper.
Set baking sheet aside to allow fruit to dry and set up.
When ready to serve, peel from the paper and enjoy them as is. Slices can also be dipped in melted chocolate.
Store cooled slices in an airtight container with parchment paper in between the slices. Slices will be very sticky.