Whisk egg whites, lemon juice, oil, 1 pinch of salt and 1 tablespoon of cold water with the whisks of the mixer until slightly frothy. Mix flour, starch, icing sugar and cinnamon, sieve onto the egg white mixture, fold in and cover and refrigerate for approx. 1 hour.
Preheat oven (electric cooker: 150 °C/circulating air: 130 °C/gas: see manufacturer). Line a baking tray with baking paper. Fortune cookies have to be filled and formed quickly, so prepare only 2-3 pieces at a time: spread 2-3 circles (each 8-9 cm Ø) on the baking tray, but take approx. 1 1⁄2 teaspoon of dough per circle. Bake in the oven for about 10 minutes until the cookie edges turn slightly brown.
Remove from the oven and immediately loosen with a pallet. Lay the lucky charm crosswise in the upper third, fold the lower half of the circle upwards. Bend both ends carefully over the straight side to a half moon. Place the "kink" over the rim of a cup, let it cool down. Process the rest of the dough in the same way.
Chop the chocolate coating and melt in a hot water bath. Dip the biscuits with the round side. Sprinkle with sugar pearls, some Fleur de Sel, orange peel or chili flakes as you like. Leave to dry. Keep them airtight and cool (not in the refrigerator!) for about 2 days.