BBC Food - Recipes - Salt and pepper Sichuan prawns with soy chilli dipping sauce

Ingredients

• 1 small spring onion
• 1 small red chilli
• 5 tbsp mirin
• 4 tbsp dark soy sauce
• 1 tsp soft light brown sugar
• 1 red chilli , (seeds removed if you prefer it slightly less hot), finely sliced
• 1 green chilli , (seeds removed if you prefer it slightly less hot), finely sliced
• ½ tsp Sichuan pepper seeds
• flaked sea salt
• 2 tsp five-spice powder
• 40 raw, peeled tiger prawns , deveined
• 1 tsp sunflower oil