Sattu (Roasted Chana), blended into powder • large potato, steamed, cooled, refrigerated, and grated • onion, finely chopped • salt or to taste • spicy red chilli powder • freshly roasted and ground coriander powder • chaat masala • turmeric powder • lemon juice • ginger-garlic paste • –5 green chillies, finely chopped • freshly chopped coriander leaves •