Place 150g yoghurt in a bowl. Add 1 crushed garlic clove and season to taste with salt and pepper.
Cut 150g cucumber in half, scoop out and discard the seeds. Coarsely grate. Stir into the yogurt along with 2 tablespoons chopped mint.
Add a squeeze of lemon juice, to taste. Allow to stand for at least 5 minutes before serving for the flavour to blend.
Notes
Cooks Tip
For a thicker Tzatziki, place the grated cucumber with a little ground salt in a colander and allow to stand for 10-15 minutes. Rinse off the salt and press out as much moisture as you can. Season after adding the cucumber you probably won't need any more salt. The salt draws out the moisture from the cucumber, which can make the tzatziki a little watery, especially when being made in advance.
Store
Tzatziki can be stored for up to 4 days covered in the refrigerator.