Put the tea leaves in the fillable tea bag, and put the bag, along with the water, into a microwave-safe teapot. I make it in a transparent pot so I can see the color change, but you can also use a teacup.
Microwave it at 500 W for two minutes. When the colour has deepened, remove the teabag.
Dissolve the condensed milk into the hot tea, and then add the milk.
Microwave again at 500 W for 2 minutes, then pour it into your tea cup to finish. Sprinkle on some cinnamon powder if you'd like.
Story Behind this Recipe
This was a popular drink at the cafe I used to work at. We used a restaurant-grade steamer, but it's easy to recreate the taste at home using a microwave.
If the tea is weak, it won't have much taste, so the key is to make strong tea. Adjust the amount of condensed milk to your liking. I recommend you use additive-free milk.