I first tried this in an a restaurant in the Jewish Quarter of Krakow. It struck me as so simple and so good, I had to find a recipe.
- Whisk the vinegar, mustard, sugar and salt in a bowl. Add oil slowly while whisking.
- Halve the cucumber and seed it by running a small spoon down the center. Cut into 1/8 to 1/4 inch slices.
- Toss the cucumber and dill with the dressing to coat.