Of all the things that can go right or wrong in a kitchen, doneness. Cooking something to exactly the right degree. Is the single most important. It's also the most common point of failure.
Meat and Fish
Every protein has an ideal temperature range, and the window between perfect and overcooked is often narrow.
Fish: Fish is less forgiving than meat because it has less fat to buffer overcooking. A perfectly cooked piece of fish is opaque on the outside and just barely translucent in the centre. It flakes under gentle pressure but holds together. Overcooked fish is dry, chalky, and fibrous. And it's one of the most common mistakes in restaurants.
Different fish have different targets:
| Fish Type | Ideal Doneness |
|---|---|
| Tuna | Rare to medium-rare at most. Overcooked tuna becomes dry and mealy. |
| Salmon | Medium. Slightly translucent in the centre. Many restaurants overcook salmon. |
| White fish (turbot, hake, cod) | Just cooked through. Moist, flaky, holds together. Seconds matter. |
| Octopus | Either flash-cooked (very brief) or slow-cooked (very long). Anything in between is rubber. |
| Prawns/shrimp | Barely cooked through. Overcooked prawns are tight, curled, and rubbery. Properly cooked prawns are plump and yield gently. |
Meat: The doneness spectrum for beef and lamb is well known (rare through well done), but the more interesting question is: does the restaurant execute the doneness you requested?
A steak ordered medium-rare should be warm and red in the centre, with a well-developed crust. If it arrives medium or medium-well, either the kitchen isn't controlling its cooking, or they're not checking. Either way, it's a miss.
Vegetables: Vegetables have a doneness problem too, and it's often overlooked. Overcooked vegetables. Soft, limp, colour faded. Are one of the most widespread issues in restaurant cooking. A green bean should have snap. A piece of broccoli should have some resistance. Asparagus should bend, not droop.
The exception is when vegetables are deliberately cooked long. Braised cabbage, slow-roasted onions, confit tomatoes. Here, the long cooking is the point, and the vegetable transforms into something entirely different from its raw state. The question is always: was this doneness intentional?
What to notice when you eat:
- Is the protein cooked to the right degree? If you ordered rare, is it rare?
- Does the fish flake gently or crumble? Does it feel moist or dry?
- Do the vegetables still have life in them? Or have they been cooked into submission?