Lumpy custard ruins many homemade dessert recipes. Whisking the flour, sugar, and egg into the cold milk before applying any heat ensures a perfectly smooth base for this light tiramisu. Swapping heavy mascarpone for labneh delivers the signature tangy richness with a fraction of the fat, while a honey sweetened coffee soak provides deep roasted notes without overpowering sweetness. Resting the assembled layers for at least three hours allows the sponge to hydrate completely and the custard to set firmly for clean slices.