Peel the mango, remove the pit, and cut it into small pieces.
Put the mango, sugar, and lemon juice into a blender and blend until smooth.
Pour the blended mango mixture into an airtight container.
Freeze for at least 6 hours, stirring with a fork every 2-3 hours to break up any ice crystals.
Scoop the frozen sorbet into bowls and serve.