Begin by boiling 1 cup of water in a saucepan. Once bubbling, stir in 2 tablespoons of chai masala and a smashed 2-inch knob of fresh ginger. Let this mixture simmer for 3 minutes, allowing the flavors to meld beautifully. After simmering, strain the chai to remove the spices, then let it cool completely before using.

In a heatproof bowl, combine 5 large egg yolks, 1/4 cup of white granulated sugar, and 1/2 teaspoon of ground cardamom. Place this bowl over a pot of gently simmering water, whisking continuously for about 8 to 10 minutes, until the mixture thickens and lightens in color. Once ready, remove from heat and allow it to cool before mixing in 1 tablespoon of vanilla extract.

In a large mixing bowl, beat 16 ounces of cold mascarpone cheese until it's smooth and creamy. Next, in a separate chilled bowl, whip 1 1/2 cups of heavy cream until firm peaks form. Gradually fold the whipped cream into the mascarpone mixture, taking care to maintain the light texture, and then gently incorporate the cooled egg mixture until everything is well combined.

Take the cooled chai soak and briefly dip each hard ladyfinger into it, just long enough to soak without becoming soggy. Arrange a layer of dipped ladyfingers in the bottom of a baking dish. Spread half of the mascarpone mixture over them, smoothing it out evenly. Repeat this layering process with another layer of dipped ladyfingers and the remaining mascarpone mixture on top.

Cover the assembled Chai Tiramisu with plastic wrap and refrigerate it for a minimum of 8 hours, though overnight chilling is preferable for optimal flavor melding and texture.

Just before serving your delightful Chai Tiramisu, mix together 1 tablespoon of ground cinnamon, 3/4 teaspoon each of ground cardamom and ground ginger, and a pinch of allspice, ground cloves, and ground nutmeg. Dust this chai spice topping over the chilled tiramisu for an aromatic finish that enhances each indulgent bite.