01 - Place cubed watermelon in blender and blend until completely smooth.
02 - Pour puree through fine-mesh sieve into large bowl to remove pulp for smoother texture.
03 - Add sugar, lime juice, and salt to watermelon juice. Stir until sugar fully dissolved.
04 - Pour mixture into shallow freezer-safe dish and freeze for 30 minutes.
05 - Stir vigorously with fork to break up ice crystals forming around edges.
06 - Repeat stirring every 30 minutes for approximately 3 hours until sorbet is scoopable and fluffy.
07 - Serve immediately or freeze longer for firmer texture. Let sit at room temperature for few minutes before scooping if very hard.