Zure Saus

Description
This Sour Sauce goes well with boiled fish, boiled meat or white beans.

Ingredients

 * 4 1/2 dl water, fish stock or beef stock
 * juice of 1/2 lemon
 * 30gr butter
 * 30gr flour
 * pinch of salt

Directions
Prepare the sauce the same way as the Botersaus (fijne versie). After taking off the heat, add the lemon juice.