The Big Book of Fabulous Food – Food Wine Travel

Ingredients

• 5g (¼ oz) butter
• 1 tablespoon extra-virgin olive oil
• 1 onion, halved and sliced
• 1 garlic clove, crushed
• 80 ml (2½ fl oz/ 1/3 cup) white wine
• 2 teaspoons wholegrain mustard
• ½ teaspoon cayenne pepper
• sea salt and freshly ground black pepper
• 250 ml (8 ½ fl oz/1 cup) salt-reduced fish or vegetable stock
• 400 g (14 oz) firm white fish fillets, cut into cubes
• 1 teaspoon lemon juice
• zest of ½ lemon
• 1 small handful tarragon, finely chopped
• 1 small handful flat-leaf parsley, finely chopped
• 50g (1¾ oz / ½ cup) grated parmesan
• 1 cauliflower, cut into florets
• 1 tablespoon milk
• 1 tablespoon Greek yoghurt
• 1 teaspoon prepared horseradish