Drain all water, peel the pistachio and blend it in a mixture for a fine paste.
Take a broad non-stick pan, and cook sugar and 1/2 cup water on medium flame till the syrup is string consistency, stir continuously to avoid burning.
Add Pista paste to it and continuously mix for 5-7 mins on low flame till the mixture leaves on the sides of the pan. Add 2-3 drops of green edible food colour as per your liking.
Transfer the mixture to a plate. Grease it properly to avoid sticking. Spread the mixture evenly using a spoon. Keep for an hour to set.
Cut in equal square pieces.
Serve or store at room temperature in an air-tight container.
This recipe is perfect for a summertime dinner party. Star anise and fennel seeds are widely available, while chaat masala can be bought from Indian grocery stores and online. This dessert requires overnight freezing so make sure you start it in plenty of time.