01 - Pat tilapia fillets dry with paper towels. Combine chili powder, cumin, smoked paprika, garlic powder, salt, and black pepper in a small bowl. Season both sides of fillets with spice mixture, then drizzle with olive oil and lime juice.
02 - Heat large nonstick skillet over medium-high heat. Place seasoned fillets in pan and cook for 3-4 minutes per side until golden brown and cooked through. Remove from heat and let rest 2 minutes, then flake into bite-sized pieces.
03 - In a large bowl, combine shredded cabbage, carrots, cilantro, lime juice, and olive oil. Season with salt and pepper to taste. Toss thoroughly until vegetables are evenly coated.
04 - Whisk together sour cream (or Greek yogurt), lime juice, hot sauce, and salt in a small bowl until smooth and well combined.
05 - Heat tortillas in a dry skillet over medium heat for 30 seconds per side or microwave wrapped in damp paper towels for 30 seconds until warm and pliable.
06 - Layer slaw and flaked tilapia onto warm tortillas. Drizzle crema generously over the top. Garnish with sliced avocado, fresh cilantro leaves, and serve with lime wedges on the side.
07 - Arrange tacos on a serving platter and serve while fish and tortillas are still warm.