01 - Bring 2 cups water to boil, steep Earl Grey tea bags for 5 minutes. Remove bags and stir in honey until dissolved. Cool completely to room temperature before using.
02 - Whisk egg yolks and sugar in heatproof bowl set over simmering water. Beat continuously for 3-4 minutes until mixture turns pale yellow and thickens slightly. Remove from heat immediately.
03 - Add cold mascarpone cheese to warm yolk mixture. Whisk vigorously until completely smooth and no lumps remain. Set aside.
04 - In separate chilled bowl, beat heavy cream with electric mixer until stiff peaks form. Gently fold whipped cream into mascarpone mixture using spatula until fully incorporated and fluffy.
05 - Working quickly, dip each ladyfinger into cooled Earl Grey tea for 1-2 seconds per side. Do not oversaturate—biscuits should remain firm but moistened.
06 - Arrange dipped ladyfingers in single layer in 8-inch square dish. Spread half the mascarpone cream evenly over biscuits, smoothing top with offset spatula.
07 - Repeat with remaining dipped ladyfingers, then top with remaining mascarpone cream. Smooth surface completely.
08 - Cover dish tightly with plastic wrap. Refrigerate minimum 4 hours, preferably overnight, to allow flavors to meld and texture to firm.
09 - Dust surface generously with cocoa powder using fine sieve. Garnish with lemon zest if desired. Cut into squares and serve chilled.