01 - Preheat oven to 350°F. Line a rimmed baking sheet (approximately 9x13 inches) with parchment paper.
02 - In a large bowl, beat eggs and sugar with an electric mixer on high speed until thick, pale, and tripled in volume, approximately 5 minutes.
03 - Gently fold in sifted flour and salt until just combined, being careful not to deflate the batter.
04 - Pour in melted butter and vanilla extract, folding gently until fully incorporated.
05 - Spread batter evenly onto the prepared baking sheet. Bake for 10 to 12 minutes until lightly golden and springy to the touch. Allow to cool completely.
06 - Toss diced mango with sugar and lime juice. Set aside to macerate while preparing other components.
07 - In a heatproof bowl, whisk together egg yolks, sugar, yuzu juice, and lemon zest until combined.
08 - Place the bowl over a pot of gently simmering water to create a double boiler. Whisk constantly for 6 to 8 minutes until thickened. Remove from heat.
09 - Whisk in diced butter until smooth and glossy. Cover and refrigerate until chilled.
10 - Whip cold heavy cream with powdered sugar and vanilla extract until medium-stiff peaks form. Keep refrigerated until assembly.
11 - Using a round cutter measuring 2.5 to 3 inches in diameter, cut 12 discs from the cooled sponge cake.
12 - Place one sponge disc as the base. Pipe or spread a layer of yuzu curd, top with macerated mango, then pipe a layer of Chantilly cream.
13 - Add a second sponge disc on top. Repeat with remaining ingredients to create 6 mini cakes. Garnish with extra mango, mint, and edible flowers if desired. Refrigerate for at least 30 minutes before serving.