Wash the turmeric roots thoroughly under running water for a minute.
Boil water in a pan and then immerse these roots in it.
Let it boil for 45 minutes on low-medium flame. Froth will begin to appear at the top.
Drain the water. Roughly chop the roots after they have cooled down completely.
Place a kitchen towel over a disposable plate to soak in the excess water.
Spread the chopped roots over it.
Do not crowd them, use multiple plates if needed. Spread them out evenly.
You need not keep it in direct sunlight all the time. A well-lit, ventilated area by the window should do the job.
Leave it there for a week. Keep tossing it every other day to ensure even drying.
Over the week, you will notice that the roots will begin to shrink and get dried up. That is what we want.
Grind the turmeric into a fine powder.
Depending on the power of your food processor or blender, you may want to sift the powder through a sieve and return large pieces to your food mill.
Once cooled down, store the freshly prepared turmeric powder in an airtight container.