Finely grate the zest of one lemon
Quarter the lemon and remove seeds
Add the greek yogurt, 1/2 lemon zest, juice of 1/4 lemon and olive oil together in a bowl. Stir well.
Season with salt and pepper and taste, add more zest or lemon juice if you prefer a really bold flavor.
Move to refrigerator. Flavors best if allowed to rest for an hour or two before use.