Grate the cucumber and squeeze out excess moisture.
In a mixing bowl, combine Greek yogurt and the strained cucumber.
Add minced garlic to the bowl.
Pour in olive oil and red wine vinegar.
Season with salt to taste.
Mix all ingredients thoroughly.
Stir in fresh dill or mint if desired.
Taste and adjust seasoning if necessary.
Cover and refrigerate for at least 30 minutes.
Serve chilled as a dip or topping.