Slowly, while whisking continuously, pour two ladlefuls of the hot broth into the egg mixture to temper the eggs.
Add the tempered egg and lemon juice mixture back into the pot and stir to combine.
Turn off the heat immediately and serve with freshly chopped parsley.
1/4 cup fresh parsley
Notes
Leftover soup can be stored in an airtight container in the fridge for up to 2 days. The soup will probably separate a bit as it sits.To reheat leftovers, warm leftovers slowly on the stovetop, stirring to help the broth reheat and come back together without cooking the eggs. Do not bring to a boil, or the eggs will curdle.