Make a simple syrup: combine sugar/water in small sauce pan, bring to boil and stir to dissolve sugar. Cool completely. Prepare fruit: cut away rind, remove seeds, cut into chunks.  Puree in food processor/blender until smooth (I like mine a little chunky, not pulverized!) In a shallow baking dish, combine syrup and puree. Freeze and stir with a fork every 2-3 hours (or when you can) to create slushy texture. To serve, sit at room temperature 10-15 minutes and stir with a fork again.