Cut the cucumber in half and grate it finely. Place the grated cucumber in a sieve or colander and squeeze out the excess moisture; this prevents the tzatziki from becoming too watery.

Add the grated cucumber to the Greek yogurt. Also add olive oil, pepper, and salt. Then press in a clove of garlic and add it to the mixture. Finally, add a splash of lemon juice to the tzatziki.

Mix all ingredients well until they are thoroughly combined and have a creamy texture.

Store the tzatziki in a sealed container in the refrigerator. Enjoy this fresh dip on a pita bread or as a flavorful dip with bread.