Peel the skin off of the Ginger and wash it thoughly.
Grate the ginger and set it aside.
In a pan add the seseme oil and let it heat. Once hot add the mustard seeds and let it splutter.
Once the mustard seeds splutter, add in the turmuric and asafoetida powder and saute for a sec.
Now add the grated mango ginger and saute well for around 5-10 minutes in medium flame. the ginger will start releasing water.
Add more water if need to help the mixture cook. make sure the mixture is cooked well before the next step.
Let the mixture cook in its own juices and start changing color. The mix is cooked when mango ginger changes color to a orangish color from yellow.
Add the red chilli powder, tamarind paste and salt and let the mixture cook together for 5-8 minutes more in medium flame to avoid burning
At this point any excess water should be evaporated and the pickle should start releasing the oil form the sides.
Let the mixture to boil till the water gets drained and the thokku becomes thick.
At this point add roasted fenugreek powder and mix well. remove form heat and let it cool down
Notice more oil will separate from the thokku. This oil will help the pickle last longer. once its completely cool down, store it in the air tight container.