How to Make It
In a small saucepan, combine 1 cup of the water with the sugar and bring to a boil, stirring occasionally to dissolve the sugar. Let cool, then add the remaining 2 cups of water and the lemon juice.
Pour the lemon syrup into a 9-by-13-inch glass baking dish and freeze until slushy, about 2 hours. Using a fork, scrape the ice crystals into the center and freeze again. Repeat the scraping every 30 minutes or so until the entire mixture has turned into ice flakes. Spoon into small glasses and serve.
Mint or basil would be terrific additions to this recipe. Add 1/2 cup of herb leaves to the water and sugar and bring to a boil. Strain out the herbs once the syrup cools, and proceed with the recipe.
You can also freeze this mixture in an ice cream machine to make smooth, creamy lemon sorbet.