Assemble four to six canning rings & lids with the metal lids sides facing upward. Lightly oil the insides & bottoms.
Unroll or 'unshell' a store-bought prepared pastry dough circle onto a floured surface.
Cut circles, each about 1" wider than the prepared lids.
Work & shimmy these pastry circles into each prepared lid & evenly press up the sides. Trim the edges along the rims.
Fill each with a scant 2-3 tbsp of your favourite jam.
Cut a remaining unrolled pastry circle into shapes or strips for lattice & decorate the tops of the jam-filled pastries.
Lightly brush with milk.
Set pies on a baking sheet.
Bake in centre of a preheated 350°F oven until lightly golden, about 20min.
