You can also use regular size idlis to make this. Just cut it into small pieces and follow the recipe.If you dont have mini idli tins, but still want to make it, here you go... steam idli batter in a cake tin. Once it is done, cool it and cut out mini idli's using a round cookie cutter or bottle cap.You can also use grated carrots to make it extra healthy. Just add it along with chopped onion.If you feel that the idli's have become hard, add around 1/4 cup of milk and keep for 5 mins, before serving. It will soften the idlis.You can use Kara Boondi or Kerala Mixture or any fried savory snack as a garnish.