01 - Squeeze the lemons thoroughly to obtain fresh juice, removing any seeds.
02 - In a large pitcher, combine lemon juice with sugar. Stir continuously until sugar completely dissolves.
03 - Pour cold water into the pitcher and mix well to incorporate all ingredients evenly.
04 - Add ice cubes to the lemonade. Taste and adjust sweetness or water ratio as needed.
05 - Pour into glasses over ice. Garnish with lemon slices and fresh mint leaves if desired.