Firstly add white pea beans in a pot along with 2 cups of water and soak it for 7 to 8 hours.
Take a pressure cooker and add white pea beans along with water in it.
Add salt as per taste.
Pressure cook it for 1 whistle and then cook it on low flame for 5 minutes. Turn off the flame and don't open the lid until steam releases completely.
Now once the steam has released, Open the lid to check if it's cooked properly or not. It must turn soft and mushy.
Now pressure cook 10 to 12 potatoes in a pressure cooker. 2 to 3 whistles are enough to boil them.
once boiled, peel them well.
Take a bowl and add the potatoes to it. Mash them well.
Now add 1 cup cooked white pea beans to it.
Mix them properly using a masher.
Now add salt as per taste.
Add 1/2 tablespoon of cumin powder to it.
Add a tablespoon of coriander powder to it.
Now finely chop the onion and coriander leaves.
Add the chopped onions to the mixture.
Add freshly chopped coriander leaves to it.
Add 1/2 tablespoon of black salt to it.
Mix them well using your hands. Your potato mixture is ready. Keep it aside for later.