Cut the cauli into florets, drizzle with olive oil and roast at 200c for 20 mins
Finely dice the stalks and set aside
Brown butter slightly then add flour cook for 5 mins
Add milk to roux a little bit at a time constantly stirring
Add the mustard, nutmeg and bay leaf simmer for 10 mins
Stir in half of the cheese until melted and season to taste with salt
Mix the roasted cauliflower through the sauce
Top with remaining cheese and bake at 200c for 15 mins
Add a large knob of butter to a pan and fry the cauli stalks until golden brown
Add Panko and cook until golden and crispy add a pinch of salt and the sage
Top the cauli cheese with the crumb and serve