Cut all the vegetables rinse them well and keep it ready. For palakkad aviyal these 5 vegetables are used - carrot, yam, drumstick, ash gourd and cluster beans. Make sure to cut them lengthwise like shown. Set aside.
To a mixer jar, add coconut, jeera and green chillies. Grind to a coarse mixture, Set aside.
First add yam and drumstick as they are tough to cook vegetables so we are adding them first. Add water and cook until 1/2 cooked.
Then add carrot and cluster beans. Cook covered until 3/4th.
When it is 3/4th cooked finally add ash gourd. Cook until soft then add coconut mixture. Cook and simmer until raw smell leaves.
Switch off. Add thick yogurt. Mix well. Add curry leaves and coconut oil.
Serve with rice and curry.