Prepare cucumber garnishes by cutting thin slices and soaking them in ice-cold water for 10–15 minutes.

Peel and cube enough cucumber to measure 1 standard cup.

In a blender, combine the cubed cucumber, sweetener, mint leaves, and 1 cup of cold water. Blend until smooth (30–45 seconds).

Strain the blended mixture into a pitcher using a fine-mesh strainer.

Stir in freshly squeezed lime juice and a pinch of black salt. Add remaining water to balance flavors.

Serve over ice in tall glasses and garnish with cucumber slices and mint.