01 - Preheat oven to 400°F. Line a baking tray with parchment paper.
02 - In a bowl, toss cod fillets 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 12–15 minutes, or until the fish is opaque and flakes easily with a fork.
04 - While the fish bakes, combine shredded cabbage, carrot, cilantro, lime juice, olive oil, and salt in a bowl. Toss until well mixed.
05 - Stir together sour cream, lime juice, and lime zest in a small bowl. 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 baked cod, and drizzle with lime crema. Add avocado slices if desired. Garnish with fresh cilantro and serve with lime wedges.