How To Select A Fish and Estimate Its Cooking Time

To determine cooking time of a fish:

Measure the fish at its thickest point; calculate 10 minutes for every inch (2.5 cm) of thickness.

For example, roast a 4-inch thick fish 40 minutes, or grill a 2 1/2-inch thick fish 25 minutes, about 12 per side.

Calculations are fine, but you should also keep in mind this empirical method for determining doneness:

Stick a toothpick into the thickest part of the fish, near the backbone. If the flesh is no longer translucent and flakes easily, it is done.

A Couple Of Tips:

1. Remember, the fishmonger's job is to sell fish. Trust is fine, but keep your eyes open.

2. Don't overcook the fish, lest it become dry and its texture suffer.