Preheat oven to 400 degrees F. Coat a large rimmed baking sheet with cooking spray.
Stir oil, seasoning blend and salt together in a medium bowl. Add fish and toss to coat. Transfer to the prepared baking sheet and bake until the fish flakes easily, about 10 minutes, depending on thickness.
To assemble tacos, place 1 or 2 pieces of the fish, 2 slices avocado and 1 tablespoon pico de gallo in each tortilla.
