1Heat oven to 375°F. Spray large cookie sheet with cooking spray.
2In large resealable food-storage plastic bag, place seasoning mix (from dinner kit) and fish pieces. Seal bag; shake to coat fish with seasoning. Place fish on one side of cookie sheet. Bake 8 to 10 minutes or until fish flakes easily with fork. Place taco shells (from dinner kit) on other side of cookie sheet for last 4 minutes of bake time.
3Meanwhile, in medium bowl, toss coleslaw and dressing.
4Divide coleslaw evenly among warmed taco shells. Top each with fish, diced avocado and 2 teaspoons taco sauce (from dinner kit). Serve with lime wedges.