Found it!
This is a recipe for the famous green gravy that is served with the East End (London, UK) speciality of Pie, Mash and Liquor.
Ingredients Parsley Liquor
25 Gram Butter (1 oz)
25 Gram Plain flour (1 oz)
300 ml Water (10 fl oz)
4 Tablespoon Chopped fresh parsley
Salt and freshly ground pepper
1 Teaspoon Malt vinegar, optional
How to make Parsley Liquor
* Parsley LiquorMelt the butter in a saucepan. Add the flour and cook for 1 minute.
* Gradually add the water or stock. Bring to the boil, stirring continuously. Add the parsley and seasoning and vinegar if using.
* Serve with a minced beef pie and mashed potatoes.
Note:
You can use chicken stock to make your Parsley Liquor in place of the water
I love the stuff I learn on this forum!!