Soak dal in one cup of water for 20 minute. In a pressure cooker add dal with water ,chopped gongura leaves ,chopped onion, chopped tomato, crushed garlic ,turmeric powder, red chili powder and salt.Let it cook for 1-2 whistle.
If you are not using pressure cooker ,then cook this mixture until the dal is cooked properly.
In a pan heat oil, add mustard seeds.Let it sputter. Add dry red chili and curry leaves.Add asafoetida and immediately add this to cooked dal.
Mix well and let the dal cook for another minute. Switch off the flame and transfer to your serving bowl.