Make Crepe Batter: In a bowl, whisk eggs, powdered sugar, lemon zest, melted butter, flour, salt, and steeped milk. Chill at least 30 mins.
Cook Crepes: Using a non-stick pan brushed with butter, pour ~¼ cup batter, swirl thin, cook 30–45 sec per side until lightly golden. Cool on wire rack.
Whip Filling: In a mixer, whip 1½ cups heavy cream to soft peaks. In a separate bowl, whisk mascarpone, 2 tbsp honey, vanilla, then fold in whipped cream. Reserve ½ cup whipped cream.
Layer the Cake: On a cake stand, place a crepe, spread a few tablespoons of mascarpone cream, repeat until using most crepes. Top with reserved cream swirl. j