Start by prepping your veggies. Using a mandoline, carefully slice an onion until you have about 1/2 cup.
Cut your cucumber in half lengthwise. Using a spoon, scoop out the gooey seeds in the center and discard.
Drain, rinse, and dry your can of chickpeas. Discard any loose chickpea skins.
Add vegetables to a mixing bowl, and set aside.
Prep the dressing - mix all dressing ingredients in a small bowl and whisk until combined. Taste, and adjust seasonings if desired. Then, pour over the salad and stir. Let this mixture sit while you complete the rest of the steps, so the vegetables can marinate.
Chop up your bunch of parsley then add to the bowl. Mix.
Finally, crumble about 1/2 cup of feta into the salad, and mix. Feel free to add more or less feta to your liking.
Let the salad rest in the refrigerator, covered, for at least 15 minutes before serving, so the flavors can all meld and the sharp bite of the red onion softens.
To serve, garnish with more parsley and extra sesame seeds, if you'd like.
Enjoy!