Cauliflower macaroni cheese

Ingrediënten

• 1 large cauliflower, broken into small florets
• 600g whole milk
• 30g salt
• 300g macaroni
• Groundnut or grapeseed oil, for deep-frying
• 240g gruyère cheese, coarsely grated, plus 50g extra for sprinkling on top
• 120g parmesan cheese, grated
• 12g sodium citrate (specialist ingredients, p.395)
• 30g wholegrain mustard
• 90g brown butter (see tip, p.204)