I start getting nervous that it's going to go bad before it gets eaten, and I hate throwing away fruit. Especially watermelon (I know I'm cheap, but common, I can't be the only one that thinks they're expensive...).
My 4 year old daughter helped me make this, and we had it in the freezer within 15 minutes. My husband made this for her when she was a baby, and teething...the ice felt amazing (I'm sure) on her tender gums, and we knew exactly what was in it, so we were happy to give it to her!
4 C watermelon
As it is is whirling away in the food processor, add in the sugar (if you're using any...when my husband made it for our daughter as she was teething, he didn't add any sugar). Once everything has been all processed together, strain the juice out into any pan that will fit into your freezer. I didn't have much freezer space, so I just used an 8"x8" metal pan. I would normally prefer a glass dish, since you have to scrape it with a fork, and scraping against a metal pan with a fork is like nails on a chalk board to me; however, I didn't have any glass dishes handy, so, I just grabbed the metal and was pretty gentle with it. I also had the worlds smallest strainer, for some reason, but even straining out little bits at a time, it only took me about 5 minutes to get through everything.
Just discard the pulpy leftovers, and you'll be left with a lovely watermelon juice. How pretty is that?? We're almost finished! Just pop this into the freezer for 1 hour.
I actually got caught up playing with my daughter, so I left this in the freezer for about 1 1/2 hours, but no worries. With your fork, break up the block so that you get small crystals, and put it back into the freezer, for another 1 hour. Keep pulling this out every hour, scrape the crystals and put it back in. You'll only need to do this 3-4 times before it's ready to serve! If you've ever had a snow cone, this is the texture of a granita; icy, and super refreshing, perfect for a hot summers evening!