Grind together urad dal, turmeric powder, coriander powder, fennel powder, crushed black peppercorns, garam masala powder, red chilli powder, dried mango powder and salt.
Transfer into a bowl, add gram flour and mix well. Divide the dough into equal portions and roll into balls. Shape each ball into a katori, place some urad dal mixture, gather the edges and seal. Shape into a ball again. Heat a non-stick tawa. Dust each stuffed ball in dry flour and roll into a roti. Place each roti on the hot tawa. Drizzle a little ghee all around and cook, turning sides, till both sides till golden brown. Serve hot.