Wash the water melon peel and cut these to small cubes. Add in a blender, add rest of the ingredients except water and blend. Once blended, open the lid and add water to get desired consistency. The consistency should be that of Apam/Idli batter. Once blended well, empty it in a bowl and allow to settle for min 30 minutes. After 30 minutes it is ready to be used to put in Upam plate / Idli maker . If we want to make dosa, we will add little more of water to get dosa batter consistency. If you relish South Indian dishes, you gonna love this recipe, super easy, less demand on preparation and time besides wholesome nutritious and tasty.