In a large mixing bowl, combine all-purpose flour, sugar, salt, and yeast, ensuring they are evenly mixed. Cut in cold butter until the mixture resembles coarse crumbs. Add the egg and milk, stirring until a soft dough forms. Knead gently for a minute or so, then shape into a ball, ready for chilling.

Wrap your formed dough in plastic wrap and refrigerate for at least 1 hour, or even overnight to enhance flavors.

Peel and slice about four cups of tart apples. Toss the apple slices with sugar, cinnamon, and nutmeg, creating a fragrant mixture.

On a floured surface, roll out the chilled dough into a large rectangle, about 1/4 inch thick. Place the spiced apple filling down the center, leaving edges clear for folding. Fold the dough over the filling from both sides to create a loose oval shape.

Preheat your oven to 350°F (175°C). Transfer the shaped kringle to a parchment-lined baking sheet. Brush the top with an egg wash for a golden crust. Bake for 25-30 minutes, until puffed and golden brown.

Once cooled slightly, whisk together a vanilla glaze to drizzle over the warm pastry. Allow it to set for a few moments before serving.