This recipe cooks Pacific cod from frozen using a french cooking method called "confit." Cooking fish confit in extra-virgin olive oil is a great way to ensure that it ends up extra flaky and moist.
Confit (prounounced cown-FEE) is a technique that gently poaches ingredients in oil or fat, in order to cook food to a luscious, tender texture. It also infuses the oil with the flavors of everything that's cooked with it — aromatics like garlic, herbs, and citrus — to produce an intensely flavorful meal.
In order to poach food in oil, you'll be cooking at a relatively low temperature over longer cook times. This recipe requires about 45 minutes to cook sturdy vegetables using the confit technique, plus an added 10 minutes for fish. While it's a lot of time, you won't need to do much more than set a timer and wait.