Because I am allergic to egg white, I used an egg substitute.
Limited counter space requires smart equipment management, which is why rolling pastry between two sheets of greaseproof paper prevents flour buildup and eliminates the risk of a tough dough. Working with chilled butter keeps the fat solid until it hits the hot oven, creating steam pockets that yield a flaky crust rather than a dense, greasy barrier. Mixing pastry with a knife instead of warm hands prevents the butter from melting prematurely during incorporation. Chilling the formed dough for a minimum of 15 minutes relaxes the gluten network, stopping the pastry from shrinking violently up the sides of the tins during baking. Curdling often startles home cooks when the ground almonds and eggs are beaten together into the creamed butter and sugar; introducing the flour stabilizes the emulsion immediately. Visual cues dictate doneness here because thermometers are useless for pastries of this size. Watch for the frangipane to puff slightly and turn golden brown around the edges while springing back when pressed lightly at 180°C. Leaving the tarts inside the metal tins until they are completely cool prevents the fragile, warm butter pastry from cracking or crumbling upon removal. Icing thickness requires careful water regulation; the final glaze must be opaque and glossy enough to coat the back of a spoon without running over the pastry rim. Placing half a glacé cherry onto the wet lemon icing before it hardens anchors the fruit firmly as the sugar sets.