Peel the skin of the potatoes and cut them into chips. (Refer to the video)
In a mixing bowl, add ½ tsp turmeric powder, 1 tsp red chili powder, 1 tsp coriander powder, salt to taste, ½ tsp fennel seeds powder, ¼ tsp garam masala, ½ tsp dry mango powder, 1 tsp sugar, and ¼ cup water. Mix well; the masala paste is ready. Keep it aside.
Heat oil in a pan, add the potato chips, and fry them on medium-high flame until they become slightly golden brown. Keep them aside.
In a pan, add 3 tbsp oil, ½ tsp mustard seeds, ½ tsp cumin seeds, 1 tsp white sesame seeds, a pinch of hing, and 2 dry red chilies. Sauté.
Add 2 chopped green chilies and sauté.
Then add the masala paste and sauté until the oil separates from its sides.
Add the fried chips and 1 tsp kasuri methi. Mix well.
Cover and cook the sabzi for 5 minutes on low flame.
Enjoy batata chips nu shak with masala puri.