Greek fish stew

Ingredients

• 1 tablespoon vegetable or olive oil
• 1 leek, pale section only, thinly sliced
• 1 medium brown onion, finely chopped
• 2 cloves garlic, crushed
• 1 baby fennel bulb, finely chopped
• 1 medium red capsicum, finely chopped
• 1/4 teaspoon ground turmeric
• 800 grams can chopped tomatoes
• 1 litre (4 cups) chicken stock
• 2 teaspoons finely grated lemon zest
• 12 chat (baby) potatoes, quartered
• 700 grams seafood marinara mix or coarsley chopped boneless white fish fillets
• 1/2 cup coarsely chopped flat-leaf parsley
• bought garlic bread, heated, to serve