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 on the prepared baking tray.
03 - Bake for 12 to 15 minutes, or until the cod is opaque throughout and flakes easily when tested with a fork.
04 - While the fish bakes, combine shredded cabbage, carrot, chopped cilantro, lime juice, olive oil, and salt in a mixing bowl. Toss thoroughly until well combined.
05 - In a small bowl, stir together sour cream or Greek yogurt, lime juice, and lime zest. Season with salt and pepper to taste.
06 - Heat tortillas briefly in a dry skillet over medium heat or warm 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 with lime wedges alongside.