Take a pan and add cumin seeds (Jeera), carom seeds (ajwain), fennel seeds (sounf), black pepper (kali mirch) and fenugreek seeds (methi dana).
Dry roast them on low heat for 3-4 minutes or until these spices begin to change the colour and turn aromatic.
Take these spices off the gas.
Add black salt (kala namak), rock salt (sendha namak) and asafoetida (hing).
Saute them too for a minute as the pan is still hot.
Transfer these spices in a wide plate so that they cool down quickly.
Also add rest of the ingredients i.e. dry gooseberry powder or dry mango powder (amla powder or amchur), dry Pomegranate seeds (anardana), dry ginger powder (sonth), dry mint leaves (sukha pudina), dry basil leaves (sukhi tulsi) and sugar Candy (mishri).
Grind all together, preferably in small chutney jar because this jar is best for grinding spices.
If you want the very fine texture of churan, sift it and grind again the remaining solids.
Fill it in clean air tight bottle and enjoy.