Begin by slicing the lemons thinly, approximately 1/4 to 1/8 inch thick, ensuring to remove any seeds in the process.
In a large saucepan or skillet, combine 1 1/2 cups of water with 2 cups of granulated sugar over medium heat. Stir continuously until the sugar has completely dissolved and the mixture starts to simmer.
Add your prepared lemon slices into the simmering syrup and reduce heat to low or medium-low. Allow them to simmer gently for one hour, flipping each slice every 15 minutes.
Once cooked, carefully remove the lemon slices from the syrup and place them on parchment paper in a single layer. Let them sit out at room temperature for 24 hours to dry.
After drying, take your candied lemon slices and coat them in the remaining 1/4 cup of granulated sugar.
If you choose to indulge further, melt some chocolate and dip each sugar-coated slice into it.