Olan is a traditional dish from Kerala cuisine. It is a part of the sadya menu. Olan pairs well with hot steamed rice.
White cow pea may be used instead of the red one.
Do not overcook the cow pea or the ash gourd.
You can use store bought coconut milk.
Coconut oil is commonly used in the preparation of Kerala dishes. You can use any neutral oil.
Do not cook for long time after adding the thick coconut milk.