Sichuan Chilli Crisp Pint of Prawns

Ingredients

• 15 shell-on prawns (raw)
• 1/2 lime, zested
• pinch sea salt
• heaped tsp Sichuan chilli crisp
• salt
• prawn heads & shells
• tsp tomato purée
• 1/2 lime, zested and juiced
• 2 egg yolks
• 1 tsp Dijon mustard
• 120ml neutral oil
• 1 tbsp white wine vinegar
• 2 stalks celery, finely sliced
• 100ml rice wine vinegar
• 1 tbsp sugar
• 1 1/2 tsp salt