Soak 1/2 cup of white peas or yellow peas in 2 cups of water overnight or atleast for 6 hours. Drain the soaked water.
Add 1 cup water to the peas and salt to taste. Pressure cook for 2 - 3 whistles.
Once the pattani or peas is pressure cooked, it should easily mash between your fingers. Note - There will be some residual cooked water which has to be drained. Do not throw it. Use it as stock or add it while kneading your chapati dough.
Heat a pan, add sesame oil, mustard seeds, urad dal, whole dry red chillies, a pinch of hing or asafoetida and curry leaves.
Once the mustard crackles and the urad dal is roasted, add the cooked white peas.
Now add the home made Sundal podi or Sundal masala. Check seasoning and add if required.
Mix well, switch off flame and serve immediately.