For preparing oelan - brahmin special, soak red cow peas in water for about 5 hours before preparation.
Wash vella payar and boil it with 4 cups of water in pressure cooker. Cook ash gourd, pumpkin and green chillies for a few minutes and after boiling add salt.
Add the cooked vella payaru to pumpkin ash gourd mixture and cook for few minutes. Add jaggery.