Fry the sliced onion until translucent.
Add cumin seeds, crushed red chili, chaat masala, turmeric (haldi powder), coriander seeds, crushed black pepper and salt. Also add dried mint leaves and finely chopped green chili. Stir for a while.
Meanwhile, boil 2 potatoes and crushed them into paste form. Stir to mix the paste with the seasoning. Then add finely chopped fresh coriander leaves. Stir to mix well and turn off the flame.
Prepare dough and roll it down on a flat surface into large square bread.
Cut the bread into 3 rectangular patties and then further divide them into smaller square shapes to be used as Potato patties.
Arrange the potato filling on each patty, apply beaten egg on lose ends and fold them into triangle shape. Using fork press and glue the loose ends together.
Apply oil using a cooking brush. Bake in preheated oven at 150°c for 30 to 40 minutes.
Serve with your favorite sauce or chatney.