We need to make all three chutneys - coriander chutney, tamarind date chutney, garlic chutney. (Links mentioned below)
You can plan ahead of time and make those a day before and keep in fridge.
If you planning to make papdi and sev at home, then you can make them also few days earlier. Or buy from the store.
Making sev puri recipe:
keep all the elements on your counter ready. Have boiled, potatoes, onion and tomato. Also keep all three chutneys, sev and chaat masala on the counter.
Now arrange 7-8 papdis on the plate.
Put potatoes on the papdis.
Top it with chopped onions and then with chopped tomatoes.
Also top it with raw mangoes, if using.
Sprinkle chaat masala.
Drizzle about 1 teaspoon of green chutney on every papdi.
Then add 1-2 drops of red garlic chutney. It is hot and strong, so little goes long way.
Then drizzle about a teaspoon of meethi tamarind date chutney on each papdi.
Finally sprinkle sev on top.
Serve immediately.
Follow the same steps for rest of the plates. Or you can make 2-3 plates simultaneously.