1Thinly shave or slice the cucumbers and place them in a large bowl.
2Add the diced red onion and cubed avocado.
3Add chopped walnuts and pomegranate seeds.
4Stir in the fresh parsley.
5Add the lemon zest, lemon juice, olive oil, salt, pepper, and 1 teaspoon sumac directly over the salad and gently toss until everything is evenly coated.