Dry Roast Red chiles in a pan on medium flame and keep aside to cool
Dry roast Nigella,Fennel,Mustard,Cumin and Fenugreek in a pan on medium(Don't brown) and keep aside to cool.
When cool,grind the red chilies with the roasted spices to a fine powder.
Mix turmeric,black salt and regular salt and store in a glass jar/container.
Use for Achari Aloo,Achari Gobi, Achari Paneer, Achari Chicken or with Kadhi.
Notes
Rai Kuria/Split Mustard gives better color, but I used regular Mustard seeds as that's what I had at home. Don't over do the roasting of seeds as don't want to brown them.