Soak 2 tbsp moong dhal for 20 mins.
In a 2L pressure cooker, layer the following :
layer 1: 3 tsp each of water and oil
layer 2: 2 tbsp finely chopped onions
layer 3: 1 bunch drumstick leaves (6C)
layer 4 : a pinch each of salt, sugar and hing
layer 5: soaked and drained dhal
Closed and cook on high flame for 3 whistles (5min). Release pressure. Mix in tadka (optional)