A 60-minute rest is the whole recipe
Whole wheat at 55% hydration is dry and tight at minute five, and by minute sixty it is soft enough to stretch between two hands without a rolling pin. Skipping the rest means ripping a dough that snaps back into a short, thick lump every time.
Divide the rested dough into 120 g pieces, cover them, and keep them covered until the moment each one is used. Whole wheat forms a skin faster than any other flour on the site, and a skinned piece rips into ragged confetti instead of strips.
Palm, then thumb, then water
Roll each piece into a 40 cm rope, flatten it with the heel of your palm to 3.4 mm, then hold one end in your left hand and rip 25 mm pieces off with the thumb and forefinger of your right.
Rip, do not cut. A ripped edge is compressed and slightly curled, and that curl is what holds a chilli oil dressing instead of letting it run to the bottom of the bowl.
Rip directly over the pot. The pieces go in within ten seconds of being made, which is why this is the one shape here with no drying step at all.
Boiling and shocking
Three minutes in well-salted water, then straight into cold water for ten seconds, then drained hard. The cold shock stops the cooking and firms the surface, which is what makes the noodles separate cleanly when the dressing goes on.
Drain them properly — 30 seconds in the colander, not 5. A wet noodle dilutes the chilli oil and the vinegar, and the whole point of this dish is a dressing that clings.
Dressing at the table
Sizzle the chilli oil over the noodles, then add the black vinegar and soy at the table. The heat of the noodles blooms the chilli, and the vinegar goes in last so its acidity survives.
Toss for a full twenty seconds. Ripped noodles have crevices that a quick stir does not reach, and an under-tossed bowl tastes of plain dough in the middle.