01 - Preheat oven to 400°F. Line a baking tray with parchment paper.
02 - In a bowl, toss cod strips with olive oil, chili powder, smoked paprika, cumin, garlic powder, salt, pepper, and lime juice until evenly coated. Arrange the seasoned fish in a single layer on the prepared baking tray.
03 - Bake for 12 to 15 minutes until the fish is opaque throughout and flakes easily when tested with a fork.
04 - While the fish bakes, combine shredded cabbage, carrot, cilantro, lime juice, olive oil, and salt in a mixing bowl. Toss thoroughly and set aside.
05 - Stir together sour cream or Greek yogurt, lime juice, and lime zest in a small bowl. Season with salt and pepper to taste.
06 - Warm tortillas in a dry skillet over medium heat or in the microwave until pliable.
07 - Layer slaw onto each warm tortilla, top with flaked baked cod, drizzle with lime crema, and add avocado slices if desired. Garnish with fresh cilantro and serve alongside lime wedges.