Mix lemon juice together in a medium bowl. Add shrimp and toss to coat shrimp well. Cover and set aside while you make the soup.
Heat the oil in a saucepan add the chopped onions cook for 2-3 minutes or until they start to soften. Add the potato. Sprinkle with salt and sauté until they also start to soften, about 5 minutes.
Add the white wine and cook until it has reduced to a syrupy consistency. Add the chicken and shrimp broths and season to taste, Bring to a boil, then lower the flame to medium low and simmer for 5 minutes. Until the potatoes are soft.
When soup is boiling , turn heat to medium low and add shrimp. Cook until shrimp turn pink and turn off. Ready to serve add chopped coriander on top
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