Juice the lemons to extract the fresh juice.

Rinse the mint leaves thoroughly and pat them dry.

In a blender, combine the lemon juice, mint leaves, and sugar. Blend until the mint is finely chopped and the mixture is well combined.

Pour in the cold water and blend briefly to combine.

Using a strainer, pour the mixture into a pitcher to remove any mint debris.

Refrigerate the Limonana for at least 30 minutes to let the flavors develop.

Fill glasses with ice cubes and pour the chilled Limonana over them.

Garnish with mint sprigs if desired.