01 - Boil 2 cups water and steep the Earl Grey tea bags for 5 minutes. Remove tea bags and stir in honey. Let cool to room temperature.
02 - In a heatproof bowl, whisk egg yolks and sugar together over a pot of simmering water (double boiler) for 3–4 minutes, until pale and slightly thickened. Remove from heat.
03 - Add mascarpone to the yolk mixture and whisk until smooth and creamy.
04 - In a separate bowl, whip the heavy cream until stiff peaks form. Gently fold the whipped cream into the mascarpone mixture until fully combined and fluffy.
05 - Quickly dip each ladyfinger into the cooled Earl Grey tea (do not soak) and arrange a layer in the bottom of an 8-inch square dish.
06 - Spread half of the mascarpone cream evenly over the ladyfingers using an offset spatula.
07 - Add a second layer of tea-dipped ladyfingers, followed by the remaining mascarpone cream. Smooth the top with a spatula.
08 - Cover and refrigerate for at least 4 hours (preferably overnight) to set completely.
09 - Before serving, dust generously with cocoa powder using a fine sieve and garnish with lemon zest if desired.