Step 1

For the sweet corn sauce: In a medium heavy-bottomed saucepan, add the canola oil, onions, garlic, thyme, bay leaf, salt and pepper. Sweat on medium heat, stirring occasionally, until the onions are softened, 7 to 10 minutes. Add the wine, if using, and cook until it evaporates, about 5 minutes.

Step 2

Add the corn kernels, reserved cobs and stock. Bring to a boil over medium-high heat, then reduce the heat to medium and cook for about 10 minutes.

Step 3

For the halibut: Meanwhile, in a large plastic bag, combine 5 teaspoons of the canola oil, the cumin, lemon zest and juice, salt and pepper with the halibut fillets and allow to marinate in the refrigerator for 30 minutes.

Step 4

Discard the corn cobs, thyme and bay leaf from the sauce. Carefully pour the mixture into a blender and puree on high speed for 4 to 5 minutes. The natural starches will activate and thicken the sauce. Pour the sauce through a fine-mesh sieve into a clean saucepan. Simmer over low heat until it reduces by half, about 15 minutes.

Step 5

To finish the halibut, in a medium sauté pan, heat the butter and remaining 3 teaspoons canola oil over high heat until the butter melts and the oil is hot (a little smoke indicates it’s ready). Place the halibut fillets in the pan skin-side up and cook until a nice crust forms on the bottoms, about 4 minutes. Carefully flip the fillets and cook 3 minutes more. Lower the heat and continue to cook until the internal temperature registers 140 degrees F, about 4 minutes. Let rest, covered with foil, for a few minutes. Serve topped with the sweet corn sauce.