First make a paste of green chilly, pudina leaves,coriander leaves and 1 lemon and marinate chicken using this mix and salt. keep this for half an hour.
Heat a pan and add oil to it , when its hot add chicken
When the chicken started becoming brown
Add 2 to 3 tsp of coconut milk and stir well
Then add onion and curry leaves to it.
Saute it well and close the pan .
When the chicken gets cooked well
Add the remaining coconut milk to it.
When it boils ,keep in low flame and close the pan.
Stir the chicken for every 5 minutes
When it becomes dried, add sliced lemon
And the thin sliced potato
Stir well and close the pan again for 5 minutes.
Now our chicken is ready ,turn off the flame and add perumjeerakam to it.