Peel, wash, and chop the potatoes into bite-sized pieces and keep aside.
Wash the singre (mogri / mooli ki phali) thoroughly and cut them into small pieces.
Roughly chop the tomatoes and grind them into a coarse puree.
Break the Punjabi wadi into small uneven chunks using your hands.
Heat 1 tsp ghee in a pressure cooker and roast the wadi pieces until they turn golden brown. Remove and keep aside.
In the same cooker, heat the remaining ghee. Add hing, then add cumin seeds and let them crackle.
Add chopped ginger and green chilies, and sauté for about a minute until aromatic.
Add turmeric powder, coriander powder, red chili powder, and the prepared tomato puree. Cook for 2–3 minutes until the masala starts releasing ghee.
Add potatoes, chopped singre, and roasted wadi. Mix well, then add 1 cup water and salt to taste.
Close the pressure cooker lid and cook for 2 whistles on low flame until the potatoes become tender.
Finally, sprinkle garam masala and amchur powder for a tangy flavour. Adjust salt if needed and garnish with fresh coriander leaves before serving.