Scrub and wash the potatoes well. You can keep the skin or peel them.
Cut them to ¼th inch stick and add them to a large bowl of water. Mix them lightly so they release some starch. Drain the water, add more water and soak the potatoes for 20 minutes.
After 20 minutes drain all the water and transfer the potatoes to a clean kitchen towel. Wipe them till they are completely dry.
Preheat the Air Fryer to 380 F for 3 minutes. Transfer the dried potatoes to a clean bowl and add one teaspoon of corn starch, one teaspoon salt, black pepper to taste, one teaspoon Kashmiri red chili powder and one teaspoon garlic powder.
Using clean hands mix , mix till all the potatoes are coated with spices. Now add oil and gently toss again.
Add them to the air fryer in single layer, do not over crowd. I made the fries in two batches. Air Fry at 380F ( 190 C ) for 18-20 minutes, shake the basket half way through. Check around 15 minute point, to see if the fries are done. The timing may slightly vary depending on the thickness of the potatoes. If you like it crispy, cook for couple more minutes.
Remove the fries add ¼th teaspoon chaat masala and finely chopped coriander leaves. Taste and if needed adjust salt. Serve immediately to maintain the crunch.
If making in batches, keep the fries warm in preheated oven at 200F while the other batch is getting cooked.