This recipe is a fun and flavorful way to enjoy halibut. The halibut is seasoned with a blend of spices and grilled until cooked through. A creamy avocado crema is made by blending avocado, sour cream, lime juice, and cilantro. The grilled halibut is then placed in warm tortillas and topped with the avocado crema, shredded cabbage, and diced tomatoes.