To make the dough, combine All-Purpose Flour (2 cup), Granulated Sugar (1 tablespoon), Ground Cinnamon (1/2 teaspoon), and Salt (1 teaspoon).
Add in the Butter (1 cup) and work in with fingers. Work until you have pea size pieces.
Whisk the Egg (2) and Milk (1/4 cup) together and add to dry mixture. When combined divide into two equal portions and wrap with plastic and chill for an hour.
Peel and cut Apple (2) into bite-size pieces.
Combine Apples, Dark Brown Sugar (7 tablespoon), Ground Cinnamon (1 teaspoon), Salt (2 pinch), and Lemon (1 1/2 teaspoon) into a frying pan and cook. Stir until apples begin to cook and sugar has dissolved.
Cook until Apples begin to soften. Remove from heat. Strain the juices from the apples, keep both and cool.
Preheat the oven to 375 degrees F (190 degrees C).
Line a baking sheet with parchment paper. Dust a work surface with All-Purpose Flour (to taste).
Roll 1 dough out into a 12x10-inch rectangle. Cut that into 6 equal rectangle 3 1/2 by 4 1/2". Do this to second wrapped dough.
Whisk Egg (1) and Water (1 teaspoon) together. Brush a thin coat over each rectangle. Spoon 1 heaping Tbsp of filling onto each and spread also 1 1/2 tsp of juices. Put top on and pinch close with fork. Prick the top with a fork poke. Bake for 23-25 minutes.
To make glaze, combine sifted Powdered Confectioners Sugar (3/4 cup), 2 tablespoon reserved apple cinnamon filling juices, Lemon Juice (2 teaspoon) and Milk (2 teaspoon).
Drizzle with glaze when warm and serve.