Start by cutting 3–4 thin slices of cucumber to use as garnishes. Place them in a bowl of ice-cold water and let them soak for about 10–15 minutes.

Peel a fresh cucumber and chop it into cubes, measuring about 1 cup.

In your blender, combine the chopped cucumber, sweetener, fresh mint leaves, and 1 cup of cold water. Blend on high until smooth, about 30 seconds.

Pour the blended mixture through a fine-mesh strainer placed over a bowl or pitcher, pressing down on the pulp to extract the liquid.

Stir in the lime juice and black salt, then add the remaining 2 cups of cold water. Mix well.

Serve over ice, garnished with cucumber slices, a lime ring, and a sprig of mint.