First of all, break Parle G biscuits into small pieces and add them in the mixer jar and crush them into powder.

Now take this biscuit powder in a bowl and add room temperature milk to it and mix it well to make a semi thin batter. After that divide this batter into two equal parts. Now add green food color to one part of this batter and orange food color to the other part and mix well.

Now add water to a big pan, put a stand in it, cover with a lid and let the water boil on medium gas flame.

Now add 1/2 tsp of Eno fruit salt to the batter with orange before adding 1 tsp of milk and mix until the water boils. Now add this batter to the idli mold greased with oil and tap it.

Now put this batter filled idli stand in boiling water and cover the lid and steam it on medium gas flame for 7 minutes.

After that, add 1/2 tsp of Eno fruit salt to the green batter and add 1 tsp of milk and mix. Now add this batter to the idli mold greased with oil and tap it.

Now put this batter filled idli stand in boiling water and cover the lid and steam it on medium gas flame for 7 minutes.

Now to assemble this idli cake, beat the chilled whipping cream with an electric beater until stiff peaks form. Now fill this whipping cream in a piping bag and spread the whipped cream on the green idli cake and put the orange idli cake on it and close it with a toothpick and serve in a serving plate.

Now our tricolor idli cake sandwich is ready to serve. Enjoy this special day by making this tricolor idli cake sandwich on Independence Day.