Take the idli batter and divide it into 3 parts.

To one part add orange food colour and to other add green food colour.keep the 3rd one as it is.

Place the white batter in center in the idli mould covered with orange on 1 side and green on other. This step.requires quick hand activity else one batter cover the whole mould.

Similarly fill all the moulds and place in on gas via cooker.

After 10mints, de mould the idli and serve with sambhar and chuney.