To make Jhal Muri, firstly soak chickpeas overnight.
Next day, drain the water, wash well and boil chickpeas (you can use sprouted chana too) and potatoes.
Drain the boiled chickpeas and keep aside. Peel the potato and dice into cubes.
Finely chop onion, green chilli, tomato, coriander leaves and cucumber. Thinly slice coconut.
Take muri in a large mixing bowl. Add onion, green chilli, tomato, boiled potato, chickpeas, cucumber and peanuts and toss well.
Tip in chanachur and sev. Sprinkle black salt and chaat masala and combine well.
Drizzle mustard oil and lemon juice and toss everything well.
Garnish with coconut slices.
Serve Kolkata Jhalmuri with masala chai and pakoda.