Preparation :

• Grate the lemon zest and add it to a large bowl.
• Add the sugar over the zest and crush together well to release the flavors.
• Pour in 6 cups of water and stir. Let the mixture chill in the refrigerator for 3 hours up to 1 day.
• After chilling, squeeze the juice of 3 lemons into the mixture and stir.
• Serve the lemonade in glasses.