Cut yam, colaccasia and potatoes in cubes. Clean then with running water. In a pressure cooker add a these veggies, Soaked kala China, salt, haldi and water. Cook up to 2 whistles and let it cool down.
In the mean time cut brinjal and plantain in cubes and soak them in water or else it will be black cut the long beans in 1 inch long and keep aside.
Open the cooker and again start cooking. After a boil add other veggies and some water and salt if needed. Let the veggies cook properly.
Heat ghee in a kadai, add broken red chillies and punch phutan. Let the phutan crackel and realise it's flavour in ghee. Add crushed ginger and fry again. Add cooked curry to this tadka and let it boil for 5 mins.
Now make a powder from the pepper and add 1 tbsp of water. Mix this watery mix to the curry. Cover the curry and remove from fire.
