In a pressure cooker, add the peeled and cleaned yams along with the pinch of turmeric powder and water and mix. Pressure cook for about 3-4 whistles. This might change depending on the type of pressure cooker you have.
Once the yams are cooked, take them out of the water and let them cool down.
Next, chop them into bite sized pieces.
Next, in a mixing bowl, add the corn flour, turmeric powder, red chili powder, salt, and garam masala. Give it a good mix.
Add in the chopped pieces of the boiled yam and coat them properly with the corn flour spice mix.
Heat oil in a pan. Add the coated yam pieces and cook them for 4-5 minutes. Keep sauteing and flipping them so that all the sides are properly cooked. Cook until they turn golden brown in color.
Transfer them to a plate. Garnish with chaat masala and chopped coriander leaves and serve hot as a tea-time snack or a side dish for a meal.