Beer-battered fish tortillas

Ingredients

• 1 1/2 cup self-raising flour, plus 1/2 cup extra
• 1 teaspoon cumin seeds
• 330 millilitres can beer
• 1 egg, beaten
• vegetable oil, for deep-frying
• 500 grams flathead or john dory, cut into fingers
• 8 tortillas
• 1/2 iceberg lettuce, shredded
• Salsa
• 2 vine-ripened tomatoes, roughly chopped
• 1 avocado, seeded, peeled, chopped
• 1 long red chilli, deseeded, finely sliced
• 1 green onion, finely sliced
• 1/4 cup coriander leaves
• Dressing
• 1 lime, grated zest, juice
• 2 tablespoons sour cream