Add the caster sugar, golden syrup and warm water to a large bowl. Whisk until the sugar has completely dissolved.
Pour in the lemon juice and whisk again until everything is well combined.
Pour the mixture into an empty Ninja Creami tub, secure the lid and place the tub on a flat surface in the freezer for 24 hours.
Once completely frozen, remove the lid and assemble the tub in your Ninja Creami according to the instructions for your model.
Select the Sorbet programme and allow it to process.
Check the consistency once finished. If the sorbet is smooth and scoopable, serve straight away. If it looks crumbly or powdery, use the Re-Spin programme.
Notes
This recipe uses the exact ingredient quantities from the Ninja Kitchen Lemon Sorbet recipe included in the Ninja recipe booklet.
Make sure the sugar is completely dissolved before adding the lemon juice.
Freeze the tub upright on a flat surface for 24 hours before processing.
If the sorbet is crumbly after the first cycle, use the Re-Spin function.
If using freshly squeezed lemon juice, the number of lemons required will depend on their size and juiciness.
Always follow the assembly and processing instructions for your specific Ninja Creami model.