Dahi Puri, Crisp Shells with Cool Yogurt

Overview

Dahi puri uses the same crisp hollow shell as pani puri, but it works like a small composed salad. Each shell holds a spoonful of spiced potato and chickpeas and is covered with cool whisked yogurt, both chutneys, fine sev and a few pomegranate seeds, so a single bite is sweet, sour, creamy and crisp together. It is the mildest of the puri chaats, because the yogurt softens the chilli and tamarind and does not sharpen them. That explains why it is often the choice of diners who find pani puri or sev puri too sharp. Like its relatives, it depends on timing. The shells must still be crisp when eaten, so the yogurt and chutneys are added last, and the dish is served and eaten within minutes and never plated in advance.

Where the Dish Comes From

No separate founding story is attached to dahi puri. It borrows its shell from pani puri and the idea of dry toppings from sev puri, and commentators on street food place it as an offshoot that appeared in and around Mumbai once vendors added a curd-covered option to the water-filled and sev-covered ones already on offer. The pairing of chilled, thickened curd with tamarind and chilli appears widely in the cooking of northern and western India, so this dish may be seen as an application of a familiar sweet, sour and creamy balance to the puri that pani puri had popularised. Today it is still sold chiefly from Mumbai's chaat carts, usually at the stall that also serves sev puri and bhel puri, and each order is completed to the buyer's preferences for chutney and sev only at the moment it is handed over.

Step-by-Step Method

1. Prep

   Thicken and whisk the yogurt

   Yogurt that is thin should first drain for 20 to 30 minutes in a sieve lined with muslin, because otherwise the finished puris turn watery. It is then whisked with the sugar and salt until entirely smooth and thinned with a little cold water or milk, until it falls from the whisk in a slow, thick ribbon. It needs to be thick enough to sit on top of a puri and not run straight off.

2. Prep

   Season the potato filling

   The diced potato and chickpeas are tossed with roasted cumin powder and salt, then tasted and adjusted. This filling provides most of the savoury backbone of the dish, since the yogurt above it is mild and slightly sweet by design.

3. Prep

   Arrange the chutneys and toppings

   Small bowls hold the sweet chutney, the green chutney, the sev, the pomegranate and the chaat masala, and all of them stand beside the board where the puris will be dressed. Dressing happens quickly, and unlike most chaats it leaves no time to hunt for an ingredient midway.

4. Assemble

   Fill the shells

   A small opening is tapped into the top of each puri, and a spoonful of the potato and chickpea mixture is pressed in. The filling is packed enough to hold its shape but not so firmly that the shell cracks.

5. Assemble

   Add yogurt and chutneys

   Each stuffed puri receives a liberal spoon of the smooth curd. Over that go several drops of the dark sweet chutney and then a smaller measure of the green one. Green chutney has the sharper bite, so it is rationed, because the aim here is a soft, rounded taste and not a fiery one.

6. Serve

   Finish and serve immediately

   Sev, pomegranate seeds, a pinch of roasted cumin, chaat masala and a little chopped coriander are scattered over the top, and the puris are served at once. The shell begins to soften under the yogurt within a couple of minutes, so the dish is assembled at the table or just before the guests sit, and it is never held ahead on a tray.

Ingredient Swaps

Store-bought shells are the norm for this chaat, even more than for pani puri, because the effort goes into the curd and the toppings. Where draining ordinary yogurt is not possible, Greek yogurt loosened with a splash of milk behaves much like strained dahi, with a similar body and tang. Sprouted moong may stand in for chickpeas, and some cooks add a few cooked green peas to the potato. Out of pomegranate season, small cubes of a sweet apple give a like burst of sweetness and a crisp bite, with a slight change in flavour.

Turning the Heat Up or Down

Dahi puri is the mildest of the puri chaats by nature, because yogurt mutes chilli heat on contact, and so adjustments concern balance more than raw heat. A milder plate comes from less green chutney, more tamarind-date chutney and a little extra sugar in the yogurt. A hotter plate comes from more green chutney, or from a thin drizzle of garlic chutney placed before the yogurt, since heat added after the yogurt tends to sit on the surface and not blend in. Red chilli powder should not be stirred directly into the yogurt, which can taste gritty and uneven and not truly spicy.

Keeping and Warming Leftovers

To keep: Empty shells stay crisp for as long as a week when sealed in a dry container at ordinary room temperature. The sweetened curd may be whisked some hours before the meal and chilled under a cover, with a short second whisking at serving time because it tends to separate. The date chutney lasts up to two weeks in the refrigerator, whereas the green one lasts only 2 to 3 days. Cooked potato and chickpeas are held in their own container in the refrigerator for as long as two days. Finished puris offer nothing worth storing, as they begin to collapse within minutes.

To warm: Nothing about this chaat is warmed. Shells that have gone limp in the cupboard are the only part that may be treated with heat: spread on a tray, they crisp in about 3 to 4 minutes at 150°C (300°F) and must cool fully before any filling goes in. A puri already dressed with curd should never be heated.

References

• Colleen Taylor Sen, "Feasts and Fasts: A History of Food in India" (Reaktion Books) — on the development of yogurt-topped chaat as a variation within Mumbai's puri-based street food tradition.