One of the delightful things about granitas is that you can switch out the flavors and add herbs or spices without screwing things up. This is not baking where everything must be precise. Switch out the lemons for limes or pomegranate juice or watermelon or whatever comes up. With lemon granita you can easily add rum and have a Daquiri Granita or tequila and salt for a Margarita Granita. If you switch from lemons, to limes, add lots of mint to the lime zest/sugar syrup, remove it before freezing, add a little rum and, voila, you have Mojita Granita. Don’t add more than 2 – 3 tablespoons of alcohol to the granita mixture as it might not fully freeze, but you can serve the granita in glasses and pour a little more rum over the top.