Before shaping poptarts, I make the mango jam — peel and dice mangos, then cook them with sugar, salt, lemon juice, and citric acid. Once simmered and reduced to jam consistency, I mash lightly and cool to room temperature.
After chilling the rough puff pastry, I roll it out into a large rectangle and cut into 12 equal squares. Each square becomes a poptart shell — this part determines how neat and even your pastries look.
Onto half the squares, I spoon guava and mango jam, then top with matching square lids. After sealing edges with a fork and brushing with egg wash, I bake them until golden brown, about 20 minutes.
While they cool, I whisk confectioners’ sugar with lime juice and a pinch of salt until smooth. This tangy glaze balances the sweet filling.
Once completely chilled, I spread the lime glaze on each poptart and decorate with lime rounds or edible sprinkles for a picture‑ready finish.