Boil your potatoes and then peel and cut them into bite sized pieces
Peel your cucumbers and scoop out the seeds, cut into half moons
Sauté the cucumber slices in the butter.
Dust the flour over it, stir in, sweat slightly.
Pour in the broth, bring to the boil and then cook covered until they are soft but not mushy, try 6 minutes and keep checking every so often.
Add the cream and diced potatoes
Season with mustard, salt and pepper
Serve warm with dill for garnish