Peel the cucumber and grate with a box grater, using the large grate size.
Place the cucumber in a bowl then add a pinch of salt and 1 tablespoon of white wine vinegar. Toss and set aside to release its liquid.
In another bowl, combine the yogurt, 1/3 of a garlic clove (minced), 2 tablespoons white wine vinegar and 3 tablespoons of olive oil. Mix well until smooth and creamy.
Squeeze the cucumber with your hands to remove any remaining liquid. Discard the liquid and add the cucumber to the yogurt mixture.
Stir well then add pepper and adjust salt according to taste.
Add some finely chopped dill. Serve immediately or refrigerate.