In a medium microwavable bowl, add the chickpeas and microwave for about 10-15 seconds to just barely warm them up. While they’re warm, stir in the lemon, mustard, garlic, and ½ teaspoon salt until combined. Reserve a couple of spoonfuls of chickpeas for topping, then use a fork to mash up the rest of them (it’s fine to have some whole chickpeas, just mash as many as you can).
Add the grated cucumber to a dish cloth and squeeze out the excess moisture. This will help make sure the dip doesn’t get too runny/watery.
To the bowl, add the yogurt, cucumber, herbs, and remaining ½ teaspoon salt and mix to combine. If you can, chill in the fridge for at least 2 hours.
Serve topped with the reserved chickpeas, more parsley, black pepper, and drizzle with plenty of good olive oil.