Fish & chip pie recipe | Good Food

Ingredients

• 3 eggs (at room temperature)
• 50g butter plus extra to serve
• 2 tbsp rapeseed oil plus a drizzle
• 2 onions chopped
• 50g plain flour
• 600ml milk
• small bunch flat-leaf parsley
• 6 small cornichons (about 2 tbsp), rinsed and finely chopped
• 1 tbsp capers rinsed and finely chopped
• 1 lemon zested and juiced
• 800g floury potatoes such as Maris Piper
• 600g skinless and boneless haddock cut into chunks
• 1 tbsp malt vinegar
• 200g frozen peas