Courtesy of Chef Andrew Howarth, I had this dish when he visited Palm Springs; it was amazing.
Courtesy of Chef Andrew Howarth, I had this dish when he visited Palm Springs; it was amazing.
Applying the pesto topping before cooking requires precise heat management because the garlic and parmesan embedded in the greens can easily burn if exposed to direct flames. Toast the pine nuts until they reach a golden brown hue and smell aromatic, stopping before they turn dark, to prevent bitterness from transferring into the paste. When grilling, keep the lid down and do not flip the fish, relying on indirect heat circulating inside the covered chamber to cook the thick steaks through without sticking to the grates. Halibut contains dense, lean protein that dries out rapidly past an internal temperature of 135 degrees Fahrenheit, so monitor the opaque center closely during the final minutes of baking or barbecuing. Freezing assembled raw fish topped with pesto is not recommended because the high water content in fresh arugula ruins the texture upon thawing, turning the vibrant green paste watery and dull. Instead, process the nut and herb mixture up to two days ahead and store it covered in a refrigerator with a thin film of olive oil poured directly over the surface to prevent oxidation.