This is a recipe based on the chaat I used to sneak out and eat on dates with Danesh when I was a teenager. You can find the chaat masala spice blend and crispy sev noodles in Asian shops or online.
Boil the potatoes until they are cooked through but still firm. Drain and leave to cool.
In a frying pan, heat the oil over medium heat. When it is hot, add the cumin seeds and stir until fragrant and light brown, then add the ginger and fry for about 10–12 seconds, or until aromatic – be careful not to let it burn.