In a small bowl add all the dry spices like coriander powder, ground cumin, turmeric, red chili powder, garam masala, amchur (dry mango powder), chat masala, and salt. Mix everything together and keep it aside.
Boil the potatoes in water on a stovetop pot until its tender. Do not overcook the potatoes. Drain and keep aside.
In a pan, heat oil and add cumin seeds. Let them splutter.
Then add the boiled baby potatoes and saute for 3-4 minutes till they start browning and crispy.
Reduce heat and add the prepared spice mixture, 1-2 tablespoons of water. Mix everything well until potatoes are evenly coated with spices. Adding water prevents the spices from burning in the pot. Stir for a minute till the water evaporates, then turn off the gas.
Lastly, Squeeze some lime juice and add chopped coriander leaves. Serve them hot as a side dish or appetizer.