Makes about 1.2 litres of sauce
75g Plain Flour
1 litre whole milk
(you can use a variety of things)
1 red onion, quartered on the root
2 bay leaves
1 celery stick, roughly chopped
10 black peppercorns
Start by infusing the milk with the aromatics. 'Scald' the milk as shown in the video.
On a medium heat, melt the butter then add the flour. Cook for a few minutes.
Slowly add the milk, stirring all the time using a whisk. Once the sauce is creamy and thick, it's ready.