In a saucepan, heat the 1 tbsp Rape Seed Oil and the 1 tbsp Plain Flour. Keep stirring, and make sure the mixture doesn’t catch (although you do want to cook the Flour through properly)
After a minute or so, add a big dash of Milk and keep whisking
The sauce will thicken as it heats… keep adding big dashes of Milk (or you could use Stock) and keep whisking gently. When the sauce boils, it has reached its ultimate consistency, so if it’s too thick, keep adding liquid. About 150ml – 250ml should be enough here for a creamy but still easy-to-pour consistency
Simmer the sauce for a few minutes (to make sure it doesn’t taste of Flour at all) and add half a teaspoon of Dijon (or English Mustard Powder) and some Salt and Pepper
When you’re ready to serve – add a big squeeze of fresh Lemon, and a big handful of freshly chopped Parsley
Serve with gammon, boiled ham or with greens….