This recipe is inspired by Cedric Grolet. Silicone molds and spray gun available on my Shop Page. Make 3 days ahead. *For the poached lemons, look up at Poached Lemon Recipe.
Make the jelly first: Heat up lemon juice and water. Mix together the sugar and agar-agar and sprinkle over the hot liquid whisking swiftly. Bring to boil and cook 2 min. Remove from the heat; chill completely. Meanwhile, cut out finger limes crosswise, and squeeze out caviar. Cube the poached lemon wedges, remove supreme (flesh only) from 2 or 3 lemons, chopped roughly and set aside. For the marmalade, smooth out the chilled lemon jelly using an immersion blender giving. Fold in the cubed poached lemons, lemon supreme, finger lime, and mint. Scoop out and fill the mini half-sphere silicone mold (1 Tbsp/15g); freeze completely. Pop out from mold, and seal them by two forming one ounce (30g) inserts; keep frozen.
About the size of a tangerine, Yuzu is mainly cultivated in Japan, Korea, and China. It's incredibly fragrant just like lemon or lime juice. It adds acidity and freshness to mousse, dressing and so on. Soak gelatin sheet in cold water to soften, and drain. Meanwhile, add hot heavy cream in white chocolate, let sit a couple of minutes and mix. Add gelatin and blend, and add the remaining cold heavy cream. Add Yuzu juice; blend. Refrigerate for 12 hours. Whip to soft peaks.
Fill each cavity of the bottom half lemon mold with the Yuzu mousse half way through. Place a frozen lemon marmalade insert in the center. Close off on all sides with the silicone lid. Insert the tip of the pastry bag inside the aperture and rotate the tray while filling up each cavity. Freeze for 6 hours at least prior removing from mold. Can be kept frozen in mold for up to 2 months.
Melt cocoa butter first (cocoa butter can boil but the chocolate). Mix in white chocolate, blend and pass through a sieve lined with cheesecloth.
Make marzipan coins to hold the glazed lemon cake. Warm up the chocolate shell glaze to 86ºF/30ºC. Insert a short bamboo skewer inside a frozen lemon cake and glaze. Once set, remove the bamboo skewer, flip and place the glazed lemon cake on a marzipan coin. Repeat until done. Fill up the spray gun cup with the same glaze but warmer: microwave it for a few sec to 113ºF/45ºC. (Keep cup warm blowing hot air using an hair dryer if necessary). Air spray lemons.
Clean gun spray cup and nozzle using hot water, or use a back up cup. Heat up neutral glaze or apricot glaze mixed with 20% water, and sieve. Use at 122ºF/50ºC. Spray over glazed lemon cakes.
Gently, air spray softly positioning the gun at 15''/40cm away from the lemon ends.
Warm up a pairing knife tip in hot water and carefully poke a hole in the lemon cake end. Dip a real lemon stem tip in the chocolate shell glaze, and seal it immediately using an upside down air duster. Refrigerate overnight to set. Keep refrigerated for 48 hours max.
The lemon shaped dessert must be served thawed and chilled. Carefully, grab lemon from its foot (Wear gloves), and transfer on plate. Enjoy!