This is one of the best-known dishes from Syros, a meze reminiscent of Italian pesto, minus the nuts and cheese and made with parsley instead of basil. There are numerous renditions, with stale bread and potatoes or egg yolk, all of which give the dip body. Some versions also contain garlic and/or capers. You can find the capers and other lovingly curated Greek ingredients to pair with this recipe on my online store
here.