Make the Dough: In a large bowl, combine all-purpose flour, salt, yeast, and warm water. • Knead the dough on a floured surface for about 10 minutes until smooth and elastic. • Cover the dough with a damp cloth and let it rise in a warm place until it doubles in size, about 1 hour.

Prepare the Filling: • In a food processor, combine ground beef, egg, onion, scallions, salt, black pepper, five-spice powder, soy sauces, oyster sauce, and sesame oil. • Blend until well mixed, then set aside.

Shape the Dough: • After the dough has risen, punch it down to release air bubbles. • Roll the dough into a long log and divide it into 21 pieces (each piece should weigh about 35 g). • Roll each piece into a round wrapper, making the edges thinner than the center.

Fill and Seal: • Place a spoonful of the filling in the center of each wrapper. • Pinch the edges together to seal, forming a pleated baozi. Make sure the seal is tight to prevent it from opening during steaming.

Let the Baozi Rise Again: • Place the filled baozi on parchment paper in the steamer basket, leaving space between each one. • Cover the steamer with the lid and let the baozi rise until they double in size and become light and puffy.

Steam the Baozi: • Bring a pot of water to a boil and place the steamer basket over it. • Steam over high heat for 12-15 minutes, then turn off the heat and let them rest for 3 minutes before opening the lid. Enjoy!