Have you been throwing away yam peels? Don't anymore.

1. Soak them in cold water overnight and thereafter.
2. ADD onion, 2 teaspoons of salt, a pinch of sugar, 1 liter of kerosene (depending on the quantity of yam peels you have), and lemon juice.
3. Then leave the mixture under the hot sun for 6 hours for the water to evaporate. Make sure it dries well to the point where you can grind it without much stress.
4. Wrap the peels in a black polythene bag and wait for 10 minutes before carefully throwing them in a dustbin, because I don't know what you are trying to prepare.