Wash and soak yellow peas for 7-8 hrs or overnight.
Once soaked perfectly, then add soaked yellow peas into the pressure cooker with required water and salt. Cook the yellow peas on medium fame till 2-3 whistle. Switch off the flame and keep aside to cool down the cooker.
Take a potato, remove the skin and chop it into small pieces.
Now heat 2 tbsp oil in a kadhai/deep pan. Add chopped potatoes, sprinkle some salt and fry it till all sides become golden brown and cooked.
Remove the potatoes using a slotted spoon and keep aside.
In the same pan, add 1 tbsp oil. Once the oil gets hot enough, add cumin seeds, bay leaf and chopped onion and sauté it tills soft and golden brown.
Now add ginger garlic paste and stir it. Add chopped tomatoes, turmeric, red chili powder, cumin powder, coriander powder and salt. Stir it again till the mixture becomes soft and starts leaving some oil.
Add cooked yellow peas, fried potatoes and ½ cup of water, mix it properly and cook it till it starts boiling. Now add garam masala, mix it and cook it again for 2-3 mins.
Ghugni is ready now. Serve hot in a serving bowl, garnish it with chopped onion, tomatoes, green chilies and chopped coriander leaves. Sprinkle some chaat masala, black salt and enjoy it.
You can also top up with some tamarind and green chutney to make street food style Ghugni.