1 Heat a pan and dry-roast the tortillas until browned on both sides. Immediately fold each tortilla over to resemble a taco. Set aside – they will retain their shape as they cool.
2 Pour the oil into the pan and fry the fish fingers until crispy and cooked through.
3 Mash the avocado, mix it with the mayonnaise and season to taste with salt, pepper and lemon juice. (You can also use ready-made guacamole.)