Cut the cucumber in half and spoon out the seeds. Put it in a food processor to shred or a use a food grater. Put the shredded cucumber in a strainer. Sprinkle salt on the cucumber and allow the water to strain for 30 minutes. Blot with towels to dry.
Stir together the cucumber, dill, lemon juice, minced garlic and greek yogurt. Salt and pepper to taste.
You can enjoy this immediately, but it's best if you allow the flavors to marry in the fridge for a few hours!