01 - Preheat oven to 400°F. Line a baking tray with parchment paper and set aside.
02 - In a mixing bowl, toss the cod strips with olive oil, chili powder, smoked paprika, ground cumin, garlic powder, salt, black 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, or until the cod is opaque throughout and flakes easily when pierced with a fork.
04 - While the fish bakes, combine the shredded cabbage, carrot, chopped cilantro, lime juice, olive oil, and salt in a bowl. Toss thoroughly until well mixed.
05 - In a small bowl, stir together the sour cream, lime juice, and lime zest. Season with salt and pepper to taste.
06 - Warm the tortillas in a dry skillet over medium heat or in the microwave until pliable.
07 - Layer slaw onto each warm tortilla, top with flaked pieces of baked cod, drizzle with lime crema, and add avocado slices if desired. Garnish with fresh cilantro and serve alongside lime wedges.