In a large saucepan, add 3 cups of cold water and the Kashmiri tea leaves. Turn on high heat and let it simmer for 15 minutes, whisking occasionally.
Add the salt, cloves, cardamom, star anise, cinnamon, and bicarbonate of soda, then mix with a ladle for another 15 minutes.
As the water evaporates, add ½ cup more water to maintain the consistency.
Add 4-5 ice cubes to shock the tea, which helps develop its pink color.
In a separate pan, heat 3 cups of full-fat milk using the same measuring cup.
Add 6 teaspoons of sugar to the milk and bring it to a gentle simmer.
Strain the tea mixture into the hot milk, stirring to blend the colors.
Serve hot, garnished with chopped pistachios.