Prepare the Chai Concentrate:Follow the instructions on the back of the David Rio Chai package to prepare 3 cups. Set aside to cool to room temperature. For quicker cooling, refrigerate.
Make the Filling: In a mixing bowl, whisk together the mascarpone, egg yolks, sugar, cream, vanilla extract, Baileys, and salt using a stand mixer or a hand-held electric mixer. Whisk for 2-3 minutes until the mixture is smooth and forms ribbony trails when drizzled over itself.
Assemble the Tiramisu:The sequence of layers will be ladyfingers, mascarpone mixture, cocoa powder, and repeat. The number of layers depends on the size of your baking dish. Soak the ladyfingers in the chai concentrate for 5 seconds one by one and lay them side by side in the dish. Once the first layer is done, spread half of the mascarpone mixture evenly over the ladyfingers. Using a sifter, dust a thin and even layer of cocoa powder over the mascarpone mixture. Repeat for the next layer(s).
Refrigerate: Cover the tiramisu and refrigerate for at least 4 hours, or preferably overnight. Enjoy!