Place the toasted bread in a large bowl and cover completely with water. Allow it to soak for about 5 minutes.
After soaking, drain the bread thoroughly and transfer to a food processor. Add the garlic, vinegar, walnuts, and season with salt and pepper. Process at high speed, gradually pouring in the olive oil in batches until it becomes a paste.
When ready, serve with some chopped parsley on top.
Notes
Chef’s tip: Removing the inner part, or the germ, from garlic cloves can help reduce the pungent flavor and make the skordalia lighter and easier to digest for some, as the germ can be harsh on the stomach for some people.