1Boil the water in 2-litre saucepan. Add carrots and blanch for a minute.
2Drain the water and then spread carrots on a clean cloth and sundry (or spread them on a towel lined cookie tray and air dry in an oven (200-degree Fahrenheit) for an hour).
3In a bowl mix the mace, cloves, cardamom, salt and jaggery.
4Add the carrots and toss to mix. Transfer to a sterilized glass jar.
5Pour the mustard oil into a small saucepan and place it over a moderate heat. As soon as oil begins to smoke remove it from the heat and cool it for 4 minutes, then pour it into the jar and cover it with a clean cloth.
6Set the jar in sunlight for 13-14 days, bringing it indoor evrynight. Shake the jar two or three times daily