Take a large pan and add a steel sieve on top of it then add in water next add amla, cover and let it steam for 12 minutes.
After 12 minutes remove it and let it cool down completely.
Deseed the amlas, divide into four slices and place it on a kitchen towel to dry.
Spread chillies, garlic, ginger on the same kitchen towel and let it dry, under the fan for 20 minutes.
Heat a pan on low flame and add in cumin seeds,fennel, black mustard seeds, yellow mustard seeds, nigella seeds, fenugreek seeds and coriander seeds.
Roast on low flame, once aroma starts coming means your masala is ready.
Let the masala cool down completely and then grind a coarse powder.
In a pan heat mustard oil till smoke starts coming. Once oil is hot enough, switch the flame off and cool till its 80% cold.
Once oil is cold add in turmeric powder,Kashmiri chilli powder and mix well.
In a big bowl add in all of the vegetables,masala powder, oil, salt and mix everything well.
After mixing taste and adjust salt accordingly. Cover with a net and let it set for 7-8 hours.
Store in clean, dry, glass bottle for a longer shelf refrigerate it. If you don’t want to refrigerate it then fill it with oil till brim and then store it.