The quantities listed here will make more than you need for the Sambar; but the spice powder will keep will in an airtight container for future use...
I had a great time blending these all together by hand with a mortar and pestle! But use a spice blender, if you have one... or whatever else you have available to you. :)
1/2 cup coriander seeds
1 Tbsp gram dhal
1/2 Tbsp fenugreek seeds
Red chillies, to taste (I used 1)
1/4 tsp Asafoetida (hing) - this is an anti-flatulence herb and won't affect the taste of the Sambar Powder if you can't find any to use.
1-2 tsp oil
Dry roast the coriander seeds until fragrant.
Add the oil and the rest of the ingredients and fry briefly until all oil is absorbed.
All to cool before grinding into a fine paste.
Store in an airtight container until needed.