II
The Method
1
Bring a large pot of water to a rolling boil. Add the pork belly and blanch for 5 minutes. Drain and discard the blanching water. The pork is ready when the water runs grey and foamy — this purge is complete.
2
In a clay pot over medium heat, fry the spice paste —
doubanjiang, dried chillies, ginger, and
scallion — briefly in a film of oil until the paste deepens in colour and the fat turns red and fragrant. The paste is ready when the raw, sharp edge of the doubanjiang yields to a rounded, oily aroma.
3
Lay the blanched pork belly into the pot. Add the dark soy, light soy, Shaoxing wine, rock sugar, star anise, cinnamon, cloves, black cardamom, and dried mandarin peel. Pour in enough cold water to cover the pork entirely. Bring to a full boil, then reduce immediately to a very low simmer — the surface should barely tremble. Braise for 2½ to 3 hours. This is where the dish lives or dies: too fierce a heat renders the pork fibrous and dry; the correct low, patient simmer breaks down the collagen into gelatin and renders the fat until the belly yields without resistance to a chopstick pressed firmly into its side.
4
Lift the braised pork from the pot. Reserve the cooking liquid. On a board, chop the pork very finely — almost to a mince — incorporating pieces of skin for gelatin and some larger fragments for texture. Moisten the chopped mass with a small ladleful of the reserved cooking liquid. The correct consistency is cohesive and glistening, neither dry nor pooling with liquid.
5
Make the mo dough: dissolve the yeast in the warm water and allow to stand until slightly foamy. Combine with the flour and knead to a smooth, supple dough. Cover and allow to rise until just puffed — the dough need not double fully, as a tight crumb is characteristic of the mo.
6
Laminate the dough: roll it out into a thin sheet, fold it onto itself, and roll again. Repeat several times to build distinct layers. Divide into four equal pieces. Shape each piece into a tight round and press flat. Bake on a dry flat griddle over medium heat, turning once, until the exterior is crispy, crackled, and carries faint char marks on both faces, and the bread sounds hollow when tapped.
7
Split each hot mo through its equator, leaving one edge intact as a hinge. Pile the finely chopped braised pork generously into the pocket. The bread should remain crisp on the outside; the filling should be moist, deeply spiced, and gelatinous against the crackle of the crust.