In the microwave-safe cup, pour milk and warm for 30 seconds. Then add yeast and sugar. Stir until all combined. Set aside and let it rest 5-10 minutes until yeast becomes bubbly.
In the small bowl, whisk 2 eggs until beaten. Set aside.
In another large bowl, combine all-purpose flour, salt, melted butter, beaten eggs, yeast.
To knead the dough, continue to stretch between both hands back and forth, you need to do this for about ten minutes until the dough is very springy and stretchy.
Cover with plastic wrap and allow the dough to rise in double size (estimate 45 minutes to an hour).
Use the baking tray with parchment paper.
When the dough ready, use your scale, cut the dough and measure each around 60-63 grams.
Knead into ball ball-shaped and add some sausage. Arrange on baking. Gently cover with plastic wrap let the dough rest for 10 minutes or until they double in size.
Pre-heat oven to 350 degrees.
Brush beat egg yolk on surfaces and bake for 15 minutes.
Let cool.
Make a sauce:
In the medium pot, add some water and turn on medium heat. Put a glass bowl on the pot, whisk eggs with powdered sugar then slowly add oils.
Brush a layer of sauce on top of buns and generous sprinkle dried shredded pork.