Coconut prawns with summer salsa

Ingredients

• Summer salsa
• 1 tablespoon sweet chilli sauce
• juice of 1 lime
• juice of ½ lemon
• 1 teaspoon fish sauce
• 1 mango, diced
• 1/2 red onion, peeled and finely diced
• 6 cherry tomatoes, finely diced
• 1/2 long red chilli, deseeded and finely diced
• handful coriander, finely chopped
• 1 teaspoon sea salt
• Coconut prawns
• 3/4 cup flour, plus extra for dusting
• 1/2 teaspoon salt
• 1/2 teaspoon cayenne pepper
• 1/4 teaspoon cumin
• 1 egg, separated
• 150 millilitre beer
• 50 millilitre water, chilled
• 1 cup desiccated coconut
• 1 cup panko breadcrumbs
• vegetable oil for frying
• 30 -40 prawns deveined and shelled
• cos lettuce leaves to serve