Separate the parsley leaves from the stalks (both are used in the soup, so there’s no waste). Melt the butter in a large saucepan over a medium heat, add the onions and the parsley stalks and ...
the soup needs to spend at least eight hours in the fridge. This not only gives it time to thoroughly chill, but also allows the flavors to meld. Shallot, garlic, dill, flat-leaf parsley ...