In a mixing bowl, whisk together the all-purpose flour, granulated sugar, and salt until combined. Cut in cold butter until the mixture resembles coarse crumbs. In a separate bowl, warm the milk and sprinkle the active dry yeast on top, allowing it to bubble for about 5 minutes. Then, mix it with the dry ingredients along with one large egg. Cover the bowl and chill in the fridge for at least 1 hour.

Preheat your oven to 350°F (175°C). On a lightly floured surface, roll out the chilled dough into a rectangle about ¼ inch thick. Spoon the apple pie filling down the center, leaving space around the edges. Fold the long sides of the dough over the filling to form an oval shape and pinch the edges to seal it. Place on a parchment-lined baking sheet.

Brush the top of the Kringle with an egg wash to achieve a golden finish. Bake for 25 minutes or until golden brown and flaky. The aroma of spiced apples should fill your kitchen when it's nearly done!

Once the Kringle has cooled for about 10 minutes, prepare the glaze by whisking together powdered sugar, a splash of milk, and vanilla extract until smooth. Drizzle over the warm pastry, allowing it to soak in.