ΒΌcuplemon juicefreshly squeezed would be best. Substitute can be lime juice.
Splashwater
Instructions
Blend together the frozen watermelon and lemon juice in a high speed blender, until a sorbet consistency is reached. You may have to scrape down the sides of the blender a few times.
Add a splash of water if required to help it blend.
When it is done, add more sugar or lemon juice if you want it sweeter or tangier, and give it another quick blend.
Serve it right away using an ice cream scooper to get the sorbet into scoops. Enjoy it right away!