Wash Potatoes: Scrub the potatoes under cold running water to remove dirt. Place them in a large pot, cover with cold water, and add a pinch of salt.

Cook Potatoes: Bring the pot to a boil, then simmer for about 15-20 minutes, until fork-tender.

Prepare Dressing: In a bowl, whisk together olive oil, lemon juice, sumac, salt, and pepper. Set aside.

Cool Potatoes: Drain and let the potatoes cool slightly, then cut them into bite-sized cubes.

Combine Ingredients: In a large bowl, mix the cubed potatoes with parsley, red onion, cucumber, tomatoes, olives, and feta cheese.

Dress Salad: Pour the dressing over the salad and gently toss until coated.

Taste and Adjust: Adjust seasoning with more salt, pepper, or lemon juice as needed.

Serve: Garnish with parsley and serve warm, at room temperature, or chilled.