Wash grapes and drain.
Take grapes in a saucepan. Add 1 L of water and cook. Boil for 10-15 min until the skin bursts.
Take out the grapes with a spider spatula and immerse in a bowl of ice cold water for 5 min. Strain, peel the skin, chop and keep in the fridge.
Add sugar to the water in which grapes were cooked. Cook the liquid on medium flame for 10 min. Cool and chill.
Add 1/2 cup of chopped pulp in a tall glass, and add 1 cup of chilled grape juice. Add crushed ice, chilled water and serve immediately.
Grapes - Seedless black grapes are the best for the recipe. If grapes are seeded, remove seeds and chop.
Serving - Juice and pulp should be chilled well before serving. You can mix pulp with juice and store in the fridge for upto a week. While serving, make sure each glass has enough pulp.
Water - Add water according to taste if juice is too concentrated.