5g butter
1 /4 cup finely diced onion
finely chopped
1-1/2 tbsp AP flour
50ml full fat milk
100g fresh spinach
25ml heavy cream
freshly grated nutmeg
Heat butter in a saucepan, then add finely chopped small onion and cook for 5 mins until softened.
Stir in plain flour and cook for 2 mins, then slowly start to whisk in milk. When it has all been incorporated, gently cook for 5 mins until the sauce has thickened.
Meanwhile, place spinach in a large colander. Pour over a kettle full of boiling water until the leaves have wilted.
Place the spinach in a clean dishcloth, squeeze out any excess liquid, then roughly chop.
Stir the cream into the sauce, gently heat, then finely grate over some fresh nutmeg and season well.