To boil 2 kilos of cassava (chendan kappa in Malayalam), wash, peel, wash again, drain and chop roughly into chunks of around 5 cm (2-inches) size. Put them in a pressure cooker. Pour in enough water to completely immerse the chunks. Tip in 15 gm. of salt, put on the lid and set on high heat. As soon as you hear the first whistle, lower the heat and continue to cook for 5 minutes. Switch off the heat and let the steam cool and subside naturally. Open the cooker and drain off the broth. Serve the hot cassava with delicious cherry umman and enjoy!