Place the chopped pineapple in a deep pan. Add 2 lt water along with vinegar sugar, salt, black salt, pepper, roasted cumin powder, chilly powder and bring to a boil.
Let it simmer for for 25-30mins covered.
Remove from fire and cool completely. Pour the syrup into a blender along with mint leaves. It is now ready to be stored in a fridge for 2 weeks. To prepare the drink, place few ice cubes in a glass and pour 4-6tbsp of the thick syrup on the ice and top up with water. Serve chilled.