Take the water melon rind (the white and green part which we throw away usually) and peel the green skin with the help of a potato peeler. Also try to scrap the red part as much as possible.
Now chop the white part into small pieces or cubes. Do not make very small pieces as it will shrink upon drying.
Take the chopped white part in a small pan and add a little water enough to submerge them in water.
Boil it until the watermelon is transparent.
Once the watermelon is cooked or transparent, strain the water and keep the cooked watermelon aside.
In a small pan, take 1 cup water and 1 cup sugar. Heat until the sugar dissolves and the syrup is rolling boiling.
Off the flame and add the cooked watermelon to the syrup. Let it sit in the sugar syrup for 10-15 minutes.
Divide the watermelon with the syrup into 2-3 different bowls.
Add few drops of food colour in eat bowl.
Let it sit for 1-2 hours. After 2 hours remove the coloured watermelon pieces from the sugar syrup and spread on a plate.
Let it dry for few days on room temperature.
Once dried store in air tight container and use as desired on ice cream or baking.