01 - Preheat oven to 400°F. Line a baking sheet with parchment paper.
02 - In a mixing bowl, toss cod strips with olive oil, chili powder, smoked paprika, cumin, garlic powder, salt, black pepper, and lime juice until evenly coated. Arrange the seasoned fish in a single layer on the prepared baking sheet.
03 - Bake for 12 to 15 minutes until the fish is opaque throughout and flakes easily when pierced with a fork.
04 - While the fish bakes, combine shredded cabbage, carrot, chopped cilantro, lime juice, olive oil, and salt in a bowl. Toss thoroughly and set aside.
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 wrap in a damp paper towel and microwave for 30 seconds until pliable.
07 - Layer slaw onto each warm tortilla, top with flaked baked cod, drizzle with lime crema, and add avocado slices. Garnish with fresh cilantro and serve with lime wedges alongside.