Wash the potatoes thoroughly under cold running water to remove any dirt.

Combine the whole potatoes into a large pot and cover them with cold water. Add a pinch of salt for flavor.

Bring to a boil over medium-high heat, then lower the heat and simmer for 15-20 minutes until they are fork-tender.

Whisk together the olive oil, lemon juice, sumac, salt, and black pepper in a small bowl to create your dressing.

Drain the potatoes once they’re cooked and allow them to cool slightly. Then, cut them into bite-sized cubes.

Mix the cubed potatoes with chopped parsley, red onion, cucumber, tomatoes, olives, and feta cheese in a large bowl.

Drizzle the dressing over the mixture and gently toss everything together. Taste and adjust the seasoning if needed.

Serve at room temperature or chilled, garnishing with a touch more parsley if desired.