Cook the filling until spoonable
The filling should be thick enough to sit on a spoon without releasing a pool of liquid around it. If it remains watery, that moisture can soak through the bread or escape into the hot oil.
Remember that it will become thicker after cooling, so stop cooking before it becomes stiff or gummy.
Keep some fruit texture
Lightly mashing part of the fruit helps bring the filling together, but it does not need to become completely smooth.
Leaving a few small mango and peach pieces gives each pie more texture while still making the filling easy to portion.
Cool the filling completely
Warm filling releases steam and softens the bread before it reaches the oil. It is also looser and more difficult to keep inside the pie.
Spread the filling in a shallow container if you need it to cool faster. Avoid covering it tightly while it is still steaming.
Use soft, flexible bread
Fresh sandwich bread bends more easily after flattening. Bread that has begun to dry out can crack along the fold or separate while frying.
Keep the unused slices covered while assembling the pies. The removed crusts can be dried and processed into breadcrumbs instead of being discarded.
Leave room around the filling
More filling does not always make a better pie. An overfilled piece is difficult to close and more likely to burst in the oil.
Keep the fruit away from the edges so the egg can make direct contact with clean bread.
Strengthen the seal
Press the edges together first, then crimp them with a fork. This two-step seal is more dependable than relying on the fork alone.
Check the corners carefully because they are common places for the filling to escape.
Keep the oil at moderate heat
Oil that is too hot can darken the bread before the filling warms through. Oil that is too cool allows the bread to absorb more grease.
Aim for approximately 170–175°C. Without a thermometer, test with a small bread trimming; it should bubble steadily and turn golden gradually rather than burning immediately.
Let the pies rest after frying
The fruit filling can be much hotter than the outside suggests. Let the pies cool briefly on a wire rack before serving.
A wire rack also prevents steam from becoming trapped underneath and softening the crisp shell.