Remove the fleshy pulp with a paring knife or with clean fingers and discard the seeds.
In a blender, put all the lychee fruit pulp and make a smooth and fine puree of without adding any water. If needed, you can add in a few tablespoons of water while blending.
Tiny unblended bits and pieces are alright in the puree.
In a jar, add the lychee puree, water and sugar. Halve the lemon and extract the juice from them directly in the jar using a lemon squeezer or press.
Mix and stir until the sugar dissolves.
Pour litchi juice in glasses topped with some ice cubes if you like.
Serve Lychee Juice immediately.
While serving, you can garnish Litchi Juice with few mint leaves or lemon slices.
Notes
You can use cold water, if you don't want to use ice cubes in the Litchi Juice.
You can also refrigerate the Lychee Juice for a few hours and serve later.
Use fresh juicy and plump litchis to make this refreshing juice.
If you do not prefer a tangy taste, refrain from adding the lemon juice. Adjust the amount of sugar as needed.