1. Keeping aside 4 grapes, blend the rest with mint, sugar and 3/4cup water in a blendr. strain the juice to remove the peels and get about 2cups of clear juice.keep in jug between 4 glasses.

2. make aslit half way, lengthwise in 4 large grapes for garnishing.

3. At serving time,  take4 thin, tall glasses and full 1/4 with crushed ice or ice cubes. divide the juice between 4 glasses.

4.add soda to the juice to fill the glass.stir add more sugar if desired.

5. plase a mint leaf on the rim of the glass and press the slit of the grape on it to fix the leaf along with the grape. serve.