In a pan, add 2-3 tbsp of cumin seeds.
Dry roast on light heat till it gives aroma.
Take off from the flame, and keep to cool.
Once completely cool, grind to fine powder in coffee grinder or mixer grinder and store in an air tight container for further use.
In a blender jar, add 1 cup chilled water. You can add some crushed ice also along with it.
Add black pepper powder, cumin powder sugar, salt, ginger, lemon juice, mint leaves(dried and fresh).
You can add black salt here in this step or add later. I prefer to add later, depending on individual's preference.
Blender till ginger and fresh mint are fully blender with water and spices.
Add lemon sugar mix to glasses.
Add soda or water as preferred. Top with ice and serve immediately.