01 -
Arrange the watermelon cubes in an even layer on a baking sheet. Transfer to the freezer and freeze until solid, about 2 hours.
02 -
Working in batches, transfer the frozen watermelon cubes to a blender or food processor and puree until smooth.
03 -
Divide the puree among two loaf pans (or use one deep baking dish), packing it down as you add more on top.
04 -
Transfer the pans to the freezer. Freeze until the sorbet is scoopable, 1 to 2 hours more. Serve immediately after scooping.