Put the chicken stock,garlic and a few parsley stalks in a saucepan and gently warm for 5 minutes. Turn up the heat and bring up to the boil.
Season the beaten eggs with black pepper and a pinch of salt, then pour into the soup and allow to set for 30 seconds. Stir the egg to create thin, pasta-like strands.
Take off the heat and add the lemon zest and juice, most of the parmesan and most of the parsley leaves. Season, then serve scattered with extra parmesan and the remaining parsley leaves.
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