Sieve the bread flour, sugar, nutmeg, sea salt, and milk powder into a bowl.
Add the yeast and mix with a spatula until well combined.
Pour in the water and egg.
Knead it using a mixer for 5 minutes or a whisk for 25 minutes.
Gradually add the softened salted butter while kneading.
Cover and let the dough rest for at least 15 minutes.
Measure all sides of the loaf pan and cut the baking paper accordingly.
Insert it into the pan and butter or grease the lid.
Cut the dough into 3 equal parts.
Roll each piece with a rolling pin.
Fold it inwards until you form a cylindrical shape.
Repeat the process on the same dough once more.
Arrange them in the lined loaf pan and cover them with the lid.
Set it aside in a warm place to rise for 45 minutes to 1 hour or until it doubles in size.
Place a large pot on the stove set at high heat.
Put the ceramic beans inside and the iron rack in the middle.
Cover the pot and preheat it for 30 minutes until it reaches 200°C.
Put the loaf pan on the iron stand. Let it cook for 10 minutes.
Use a towel or potholder to turn it onto the other side to bake for another 10 minutes.
Cook the other sides for 5 minutes each. Remove it from heat and allow it to cool.