About sundal: Sundal is a healthy South Indian boiled legume salad — simple, nutritious and high in protein. This version features field beans. Famous in Tirunelveli. Mochai sundal — the Tirunelveli speciality Traditionally offered as prasad during Pongal, Navratri.
Soak field beans: Wash 1.5 cups field beans. Soak overnight in cold water. Soak dried mochai beans overnight. Peel skins for a tender, smooth texture.
Cook: Drain and cook in a pressure cooker with 2 cups fresh water, 1/4 teaspoon turmeric and salt for 3 to 4 whistles. Should be tender but not falling apart.
Drain and cool: Drain well. Cool 10 minutes. Excess water makes sundal soggy.
Temper: Heat 2 tablespoons oil. Add 1 teaspoon mustard seeds (wait for pop), 1/2 teaspoon urad dal until golden. Add 2 dried red chillies, 1 sprig curry leaves and a pinch of asafoetida.
Add aromatics: Add 1 green chilli finely chopped and 1/2 inch ginger grated. Cook 30 seconds.
Add field beans: Toss well to coat with tempered oil. Cook on medium heat 2 to 3 minutes.