Soak Toor Dal and Rice in Water for 1 hour. Drain it well and then add 1 teaspoon of Pepper, 1 teaspoon of Cumin Seeds and Salt as needed. Grind this to spreadable consistency. Spread this in Tava like dosa. Cover the Tava while cooking Adai. This will give crispiness to the Adai. You can also have Adai with Jaggery as side-dish.