Ingredients
For Batter 
1.Idly rice-1 cup
2.Raw rice-1 cup
3.Urad dal-1 cup
4.water-1 cup(adjust according to rice varities)
5.Yogurt/curd-1/2 cup
6.Pepper-1 tsp
7.salt-adjust to ur taste
8.Green chilly-3 medium sized
9.oil-1 tsp
10.ginger-1 tsp
11.Turmeric powder-1 tsp
Method
1.Soak the idly rice,Raw rice and urad dal in adequate water separately for about 4 to 6 hours. 
2.After 4 to 6 hrs drain the water from urad dal and grind the urad dal 
 in the mixer till it is finely grinded and becomes a thick 
paste.Transfer it to the dry large vessel/large bowl.
3.Drain the water from idly rice,and grind it well in the mixer 
till it is finely grinded.Adjust water accordingly.Don't pour too much 
water then the batter will become watery.
4.Then Transfer it to the large vessel/large bowl containing grinded urad dal . 
5. Drain the water from Raw rice, and grind it well in the mixer 
till it is finely grinded.Adjust water accordingly.Don't pour too much 
water then the batter will become watery.
6. Then Transfer it to the large vessel/large bowl containing grinded urad dal and grided idly rice mixture .
7.Add salt and stir it well so that it gets mixed completely.
8.Allow the batter  to ferment overnight.
9.Before keeping idlies just add yogurt/curd  to the idly batter.
10.In a dry pan add oil ,green chillies,pepper,ginger,turmeric powder and allow it to cook for a minute.
11.Then transfer it to the idly batter bowl.Now stir it well the idly batter.
12.In a idly stand just grease it with oil and with the help of the ladle pour the batter in the  idly stand.
13.In a pressure cooker with small amount of water(less than 0.25 cup) place the idly stand gently and cover the pressure cooker.
14.Dont add weight to the pressure cooker now.allow it to cook for 7 to 9 mins.
15.Now switch off the flame and add the 
weight to the pressure cooker(this allows it to cook with the help of 
the steam if it is not cooker propely and other thing is it will remain 
hot).
16.Before serving gently open the weight of the pressure cooker and 
gently take of the idlys from idly stand(If it is sticky wait for couple
 of mins else just with hand spread some water on idlis and then take 
it.It will come out well).
17.Kanchipuram Idly is ready to serve.
 
 
Kanchipuram Idly can be served with sambar/chutney.