The knife sets the clock

Feed, cut, sweep

The blade does not saw and it does not chase. The hand holding the food moves it forward by exactly one slice, the knife comes down, and the pieces go aside. Everything even about the result comes from that first move being the same size every time — your fingers are the ruler, curled back so the flat of the blade rides against your knuckles.

Worth remembering Move the food, not the knife.

Size is time

Halve the thickness of something and it cooks in far less than half the time — heat has to travel in from every surface, and thin pieces have almost no inside left to reach. That is the whole reason a stir-fry is cut into matchsticks and a stew is cut into chunks: one has ninety seconds of heat available, the other has two hours.

1. Chunk
2. Baton
3. Matchstick

Worth remembering Fast heat wants small. Long heat wants big enough to survive it.

Even beats small

A board of pieces that are all slightly too big will cook perfectly. A board where half are right and half are double will not — the small ones are already falling apart by the time the big ones stop being raw, and no amount of extra time fixes it, because extra time makes the gap worse. If you have to choose, choose even.

1. Chunk
2. Baton
3. Matchstick

Worth remembering The biggest piece decides when it is done. The smallest decides how it tastes.

When the answer is not a knife

Past a certain fineness a blade stops cutting and starts crushing, and crushed is a different ingredient: bitter in garlic, grassy in basil, weeping in onion. That is where a grater takes over — it shears rather than presses, and it is the reason grated cheese melts smoothly and grated onion gives its juice to a marinade instead of sitting in it as lumps.

Worth remembering If the knife is starting to smear, you wanted a grater.