Filo-crusted smoked haddock, cheese & leek pie - Good Food Middle East

Ingredients

• 600ml whole milk
• 3 bay leaves
• 1 tbsp white peppercorns
• 650g good-quality smoked haddock fillets (see tip)
• 1 tbsp olive oil
• 75g butter, plus extra for frying
• 1 onion, finely chopped
• 2 garlic cloves, grated
• 2 large leeks, halved and finely sliced
• 75g plain flour
• 1 tbsp English mustard powder
• juice 1 lemon
• 175g strong cheddar, diced
• 140g butter
• 6 garlic cloves, grated
• 400g filo pastry
• small bunch chives, finely snipped