Combine milk and yeast, stir and cover. Let mixture stand at room temperature for 10 minutes, untill is gets foamy.
In the bowl of a stand mixer beat egg and sugar. Add 3 tbsp melted butter. Add yeast/milk mixture. Beat to combine. Add salt to the flour. Add half of the flour and beat for 30 seconds. Scrape down the sides and bottom of the bowl. Beat for 3 more minutes.
Add the remaining flour, knead to form the dough into a ball.
Transfer to a greased bowl, cover with plastic wrap and let it rise at room temperature, until it almost doubles its size.
Butter a 9x5 inch bread pan.
Flour working surface. Roll out dough into 20x12 inch rectangle.
In a bowl combine brown sugar and cinnamon. Have diced apple ready.
Brush dough with melted butter. Sprinkle with brown sugar/cinnamon mixture. Spread diced apple on top.
Cut dough into six 20x2 inch pieces, as shown in the pictures. Stack pieces on top of each other. As they are, cut into six strips vertically, as shown in the pictures.
Loosely stack pieces, cut side up into the pan. Cover with plastic wrap and let it rise at room temperature for 30 minutes.
In the mean time, preheat oven to 350 F.
Bake bread for 35 minutes, covering the top with aluminium foil for the last 10 minutes.
Let the bread cool inside the pan for 15 minutes, then transfer to a cooling rack to cool completely.
In a bowl, combine all ingredients for the glaze and mix to combine. Add more milk to adjust the consistency, if needed.
Once the bread has cooled, drizzle with cinnamon glaze. Serve.