For the Filling
9 Potatoes, peeled and cut into chunks
2 teaspoons Mustard Seeds
1 Onion, peeled and sliced
Few teaspoons Vegetable Oil
2 teaspoons Crushed Ginger
1 pound Boneless Chicken Pieces
1/2 cup Water
1 cup Frozen Peas
3 teaspoons Red Chilli Powder
2 teaspoons Salt
1 teaspoon Garam Masala
2 teaspoons Ground Cumin
2 teaspoons Ground Coriander
1/2 teaspoon Mango Powder
Handful Fresh Coriander Leaves, chopped
For the Dough
3 cups all-purpose flour, plus more as needed
1 tablespoon granulated suga
1 1/2 teaspoon salt
1/2 cup ghee (clarified butter) or oil
1 cup warm water