Family meals: Easy fish cakes

INGREDIENTS

• 1 x pack fish pie mix (cod, salmon, smoked haddock etc, weight around 320g-400g depending on pack size)
• 3 spring onions , finely chopped
• 100ml milk
• 450g potatoes , peeled, large ones cut in half
• 75g frozen sweetcorn , defrosted
• handful of grated cheddar cheese
• 1 large egg , beaten
• flour , for dusting
• olive oil , for frying