Heat the water to a boil. In a separate pan, heat the milk to a boil, stir in the cardamom, cover, and set aside. Place the tea leaves in a heavy pot. Pour in a little of the hot water, then pour it off. Add the remaining hot water. Place over medium heat, bring to a boil, and boil for about 30 seconds, then pour the tea through a strainer into a pot. Add the hot milk by pouring it through a cloth-lined strainer into the tea. Add the sugar and stir. If you wish to froth the tea, pour the mixture into another pot, then pour it back, continuing until it`s frothy. Place the pot back over the heat and bring the tea almost to the boil, then pour it into cups.