Add the flour and salt into the kitchen machine bowl
Mix the egg well and separate out a small part of it to brush on the bread before baking.
Add the cold milk and the egg into the flour/salt and start mixing.
Add the yeast in crumbles while the machine is working on medium/low speed. Let it work for 10 minutes.
Add the soft butter in small pieces and let the machine work for another 10 minutes.
Cover the bowl with plastic and let it rest for 1h 30min.
Place the dough on a flour-covered table and knead it a few times, fold it over, roll it out to the length of your loaf pan and place it inside. Cover with a kitchen towel and let it rest for 1h.
Set the oven to heat at 190°c with an oven-proof bowl with water placed at the bottom.
Brush the dough with the egg and drizzle with poppy seeds. Cut the dough, using a razor blade, either in parallel lines or crossed (as in the picture).
Bake for 25-30 minutes until golden brown.