Heat oil in a wide pan over medium heat.
Add urad dal and chana dal. Roast on low to medium heat until golden and aromatic.
Add sesame seeds, dried red chillies, and curry leaves. Roast for another 5 minutes until fragrant.
Transfer the roasted ingredients to a plate and allow them to cool completely.
Add the cooled ingredients to a mixer jar along with salt and hing powder.
Grind to a slightly coarse texture or according to your preference.
Allow the freshly ground podi to cool completely before storing.
Transfer the idli podi to a clean, dry, airtight container.