01 - Squeeze lemons thoroughly to extract fresh juice, removing any seeds.
02 - In a large pitcher, combine lemon juice with sugar. Stir continuously until sugar completely dissolves.
03 - Add cold water to the lemon-sugar mixture. Stir well to incorporate all ingredients evenly.
04 - Add ice cubes and taste. Adjust sweetness by adding more sugar or water as needed.
05 - Pour into glasses. Garnish with lemon slices and fresh mint leaves if desired. Serve immediately.