In 1/2 cup hot water, place the tea bags, cardamoms and ginger. Cover and keep aside for 30 minutes to brew.
Strain and add to the buttermilk, sugar, cinnamon powder and vanilla essence. Give it a whisk.
Add the agar agar powder to the lukewarm water and mix well. Add this to the buttermilk mix along with 1/2 of the mixed nuts.
Transfer the contents to a non-stick pan and start simmering on a low flame. Stir continuously till it reduces and becomes a sticky mass. (This will take approx. 25-30 minutes).
Transfer it to a greased plate and garnish with the remaining nuts. Keep aside for a couple of minutes to cool down. Cut into desired shapes and refrigerate to chill before serving.
