Heat a pan, add coriander seeds and dry roast on low heat until its aromatic. Remove from heat, add to a bowl and keep aside to cool.
Place the pan back on heat, add chana dal. Dry roast until the lentils appear brown. Set it aside to cool with the rest of the ingredients.
Repeat the process with toor dal and roast until brown. Transfer to a bowl
Add black peppercorns and cumin seeds. Roast until aromatic.
Dry roast methi seeds and keep aside to cool. Careful not to burn.
Remove stems from red chilies and dry roast.
Allow all the roasted ingredients to cool completely.
Once cool, transfer the ingredients to a mixer grinder jar. Add turmeric powder.
Grind the masala in small batches. It ensures the grinder jar doesn't heat up which affects quality or aroma of the masala.
Mix and store in an airtight container.