Prepare the lemon juice by squeezing fresh lemons until you have enough juice, free of seeds, to create a bright, zesty flavor profile. This should take about 10 minutes.

In a mixing bowl, combine the freshly squeezed lemon juice with sugar and water. Stir until the sugar fully dissolves for a smooth granita texture.

Transfer the mixture into a shallow baking dish and place in the freezer to chill for about 1 hour.

After an hour, scrape the partially frozen mixture with a fork to create fluffy ice crystals. Return to the freezer, scraping every 30 minutes until fully frozen and light.

Serve by scooping the granita into bowls. Optionally, serve over a small scoop of vanilla ice cream for an extra treat.