Prepare the TangZhong: Start by heating 125 g of water to 65 degrees Celsius. When it reaches this temperature, add 25 g of flour and stir continuously until you get a thick gelatinous consistency. (This takes a few minutes.) Let it cool.
Measure out all the ingredients into the mixing bowl, add all the TangZhong, knead the dough completely and let it rest for an hour.
Start folding the dough in any way you like. Let rest for 45 minutes.
Fold the dough a second time and let it rest again for 45 minutes.
Make the last fold and leave to rest for an hour.
Finally, divide the dough into 7 pieces, place on a small tray, cover with cling film and a tea towel and refrigerate for about 10-12 hours.
When the refrigerated rising time is over, take the dough out of the fridge and let it rest for 1-2 hours, then roll the dumplings into a small rectangle, sprinkle with Parmesan cheese and roll up to form the stangles. Pinch well to fit and place on a baking tray lined with baking paper to rest on the seam.
Leave to rise in a warm place for 3-4 hours. In my case, it took 4 hours at 25 degrees.
Preheat the oven to 220°C on the bottom-up baking programme.
When the stangles are cooked, brush them with a mixture of 1 egg yolk and a splash of water and sprinkle with Parmesan cheese.
Place the stangles in the preheated oven, steam and place in the oven. Turn the oven down to 180 degrees and bake for about 25-30 minutes.