01 - Preheat oven to 375°F. Line a baking sheet with parchment paper for easy cleanup.
02 - Unroll the refrigerated pie dough. Using a 2.5-inch round cutter, cut out 12 circles from the dough sheet.
03 - Gently press each dough circle into the wells of a mini muffin tin, forming small cup shapes that fit snugly against the bottom and sides.
04 - Spoon approximately 1 tablespoon of cherry pie filling into each pastry cup, being careful not to overfill.
05 - If desired, lightly brush the exposed pastry edges with beaten egg using a pastry brush. This step creates a golden, glossy finish.
06 - Combine granulated sugar and ground cinnamon in a small bowl. Sprinkle the mixture evenly over the tops of all pastry bites.
07 - Bake for 13-15 minutes until the pastry turns golden brown and the cherry filling becomes bubbly around the edges.
08 - Let the bites cool in the muffin tin for 5 minutes, then carefully transfer to a wire rack to finish cooling completely before serving.