For the mini lemon-coconut magic cake, first preheat the oven to 160 °C. Tear zest from 2 lemons. Melt the butter and set aside. Heat the milk and let the lemon zest steep in it for a few minutes. Separate 2 eggs.
For the dough, beat the egg yolks with the sugar until foamy. Add the melted butter, the flour twice and then the lemon milk. Beat the 2 egg whites and fold them into the mixture. The batter should be runny with the egg whites floating on top. Pour the batter into the molds with a ladle. Make sure there is both liquid and beaten egg whites in each mold.
Bake for 25 minutes. The top should be golden brown. Remove from oven and let cool at room temperature for 1 hour, then refrigerate for 2 hours.
To serve, whip the third egg white to egg whites. Dip each cake half in it, then roll that half in a dollop of the shredded coconut. Keep in a cool place until serving. Serve the mini lemon coconut magic cakes decorated with slices of zirconia.