Smoked hoki chowder

Ingredients

• 2 small agria potatoes, peeled and diced
• 75 gram butter
• 4 rashers bacon, finely sliced
• 1 onion, peeled and chopped
• 1 small leek, finely sliced
• 1/2 cup flour
• 1 1/2 cup milk
• 1 cup fish stock
• 2 teaspoon chopped fresh thyme
• 600 gram frozen smoked hoki fillets, chopped into bite-sized chunks
• chopped fresh thyme to serve