1 pound mahi-mahi or other flaky white fish
    1/4 cup canola oil
    2 tablespoons fresh lime juice
    1 tablespoon chili powder
    1 jalapeno pepper, seeded, minced
    1/4 cup chopped fresh cilantro
    Salt and pepper
    8 flour tortillas (soft taco size)
    Shredded cabbage
    Sour cream
    Thinly sliced green onions
    Purchased or homemade salsa

Preheat oven to 450 degrees. Place fish in a glass dish. Whisk oil, lime juice, chili powder and jalapeno in a small bowl. Pour over fish. Turn to coat. Let stand at room temperature 15 minutes.
Transfer fish to baking sheet. Season with salt and pepper. Roast fish until just cooked through, about 10 to 12 minutes. Transfer fish to plate. Let stand 5 minutes.
Flake fish into large chunks. Discard skin and any bones. Stir in cilantro.
Warm tortillas in microwave or in nonstick skillet over medium heat. Fill tortillas with fish, cabbage, sour cream, onions and salsa. Serve immediately.