Gently fold the edges of the pastry up and over the sides of the filling, smooth any tears that appear and brush the pastry with the milk. (homespuncapers.com)
After 20 minutes, check the sides of the filling for browning and take them out just before they start to burn. (oneingredientchef.com)
The lines should match up to each other on both sides of the filling. (alexcrumb.com)