Take a frying pan and heat it on a low flame on your gas stove.
Pour 75 grams of dry red chilies into the pan. You may do it in small batches if the pan is small and for better roasting.
Stir them for about 2 to 3 minutes to dry roast them. Keep them aside.
Now, put 2 tbsp of cumin seeds into the frying pan.
Stir them to dry roast them for a minute on a low flame. Keep them aside.
Then, put 2 tbsp of black pepper into the pan.
Once again, stir them for about a minute to dry roast them nicely on a low flame. Keep them aside when done and when you can smell the aroma.
Now, put 1 tsp of mustard seeds into the frying pan.
Stir them briskly for about half a minute till they splutter and you hear the crackling sound. Keep them aside as well.
Then, put 2 cups of coriander seed into the pan.
Stir them nicely for about a minute on a low flame to dry roast them nicely until they change color and you smell their flavor.
Now, it is time to dry roast the fenugreek seeds. Put 2 tbsp of fenugreek seeds into the pan.
Stir them nicely for a minute on a low flame. Keep them aside when they are done and you smell the aroma.
Then, add 2 tbsp of chana dal or split chickpeas. Stir them and dry roast them for a minute or so on a low flame. Keep them aside when done.
Now, put 2 tbsp of pigeon peas or toor dal into the pan. Stir them similarly to roast them nicely on a low flame and keep them aside.
Finally, put 1 cup of curry leaves into the pan and dry roast them on a low flame.
Stir them nicely until they lose all of the moisture and become dry and crispy. You may try crushing one or two leaves to check if they are done nicely. Keep them aside.
Give some time for the ingredients to cool off completely at room temperature.
When the spices are cool enough, transfer them into your grinder. You may do it in batches if all do not fit in a single go.
Grind the ingredients nicely.
Check it in between and repeat to get a fine powder. Your fish curry powder is now ready to use.