01 - Bring 2 cups water to a boil. Steep Earl Grey tea bags for 5 minutes. Remove tea bags and stir in honey until dissolved. Allow infusion to cool completely to room temperature.
02 - Set up a double boiler with simmering water. Whisk egg yolks and sugar in a heatproof bowl over the steam for 3-4 minutes until mixture becomes pale yellow and slightly thickened. Remove from heat immediately.
03 - Add cold mascarpone cheese to the warmed yolk mixture. Whisk vigorously until completely smooth and no lumps remain. Set aside.
04 - In a chilled bowl, beat heavy cream with electric mixer until stiff peaks form. Be careful not to overwhip.
05 - Gently fold one-third of whipped cream into mascarpone mixture to lighten. Fold in remaining cream until fully incorporated and texture is airy and smooth.
06 - Quickly dip each ladyfinger into cooled Earl Grey tea for 1-2 seconds per side—do not soak. Arrange dipped biscuits in single layer at bottom of 8-inch square dish.
07 - Spread half of mascarpone cream evenly over ladyfinger layer using offset spatula. Ensure coverage to edges.
08 - Repeat dipping process with remaining ladyfingers and create second layer. Top with remaining mascarpone cream, smoothing surface completely.
09 - Cover dish tightly with plastic wrap. Refrigerate for minimum 4 hours, preferably overnight, to allow flavors to meld and texture to firm.
10 - Just before serving, sift cocoa powder generously over surface using fine sieve. Garnish with fresh lemon zest if desired. Cut into squares and serve chilled.