In a medium bowl, mash the chickpeas with a fork or potato masher until slightly chunky. Season with salt and pepper to taste. Spread the mashed chickpeas evenly in the bottom of a serving dish or shallow bowl.
Layer the Greek yogurt over the chickpeas, smoothing it out to create an even layer.
Next, spread the hummus over the yogurt layer.
Evenly distribute the diced cucumbers on top of the hummus layer.
Follow with the diced tomatoes, spreading them out evenly.
Sprinkle the crumbled feta cheese over the tomatoes.
Add the sliced black olives on top of the feta cheese.
Drizzle olive oil and lemon juice over the entire dip, then garnish with chopped parsley.
Serve immediately with tortilla chips or pita bread, or refrigerate for up to 2 hours to allow the flavors to meld.