Prepare the Fish: In a bowl, mix the olive oil, chili powder, cumin, salt, and pepper. Rub this spice mix onto the fish fillets evenly.
Cook the Fish: Heat a non-stick skillet over medium heat. Once hot, add the fish fillets. Cook for about 3-4 minutes on each side or until the fish flakes easily with a fork. Remove from heat and let rest for a minute before flaking the fish into bite-sized pieces.
Make the Mango Salsa: In a medium bowl, combine the diced mango, chopped red onion, minced jalapeño, cilantro, and lime juice. Gently mix until well combined. Season with salt to taste.
Warm the Tortillas: In another skillet or directly over a flame, warm the corn tortillas for about 30 seconds on each side until pliable.
Assemble the Tacos: On each tortilla, place a generous amount of flaked fish. Top with a spoonful of mango salsa and a few slices of avocado. Drizzle with sour cream or Greek yogurt if desired.
Notes
Serve with sour cream or Greek yogurt for extra creaminess.