Grate the cucumber and squeeze out excess moisture.
In a mixing bowl, combine the Greek yogurt and grated cucumber.
Add minced garlic and stir to combine.
Pour in olive oil and white vinegar.
Mix in chopped dill and season with salt and pepper.
Add lemon juice if desired for tanginess.
Stir until all ingredients are well combined.
Cover and refrigerate for at least 30 minutes.
Serve chilled with pita or vegetables.