Sprinkle tilapia fillets with 1tablespoon lime juice; rub with garlic powder and chile seasoning.
In a medium skillet, spray with non-stick cooking spray and cook seasoned filets over medium heat for 3 to 4 minutes on each side or until fish flakes easily with fork, drizzling fish with 1 tablespoon of the remaining lime juice for the last minute. Flake with fork into bite-size pieces.
In a small bowl, mix mayonnaise, remaining lime juice and 1 tablespoon cilantro. Add to lettuce; gently fold all the ingredients.
To serve, build tortillas with lettuce mix, prepared fish, cheese and remaining cilantro. Top with a couple avocado slices.
Try this tasty recipe for Grilled Fish Tacos, which are not only packed with grains but are also under 500 calories.