For Olan you need
Red cow peas / Rose moong dal / van payar / black eyed beans (It is not red kidney beans) – 1/2 cup
Colocasia (chembu) – 1/2 cup cubed (tiny cubes)
Ash gourd(Elavan) – 1/2 cup cubed (tiny cubes)
green chilies – 2 slit
coconut milk – 1.5 cup of medium thickness
Asafoetida- 1 pinch
Salt to taste
You have to,
Soak the beans overnight
Pressure cook for 3 whistles along with asofoetida and 1.5 cups water.
Wait till pressure goes. keep aside.
Add in the cubed colocasia and ash gourd with slit green chilies cook on a low fire until soft.
Add in coconut milk and cook for another 4 mins or so on low fire.
Remove from fire.
For tempering heat oil and add mustard and allow to pop up.
Add in shallots and curry leaves.
Add this to the cooked olan and mix well.
Note: Try not to refrigerate Olan and reuse. Make small quantity and finish on the same day itself.