01 - Place cubed watermelon in blender and process 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 completely dissolves.
04 - Pour mixture into shallow freezer-safe dish and place in freezer for 30 minutes.
05 - Stir vigorously with fork to break up ice crystals forming at edges.
06 - Repeat stirring every 30 minutes for approximately 3 hours until sorbet reaches scoopable, fluffy consistency.
07 - Serve immediately or store for firmer texture. Let sit at room temperature few minutes before scooping if hardened.