In a large mixing bowl, combine the all-purpose flour, salt, and ajwain seeds. Mix well.
Add the ghee or butter to the flour mixture, and mix until it becomes crumbly. Slowly add water, a few tablespoons at a time, and knead the dough until it becomes smooth and pliable. Cover the dough with a damp cloth and let it rest for 20 minutes.
In a separate mixing bowl, combine the mashed potatoes, green peas, cumin seeds, coriander powder, garam masala, red chili powder, and salt. Mix well.