In a large pot, heat the vegetable oil over medium heat.
Add the chopped onion, minced garlic, and minced ginger. Cook until the onion is translucent and the mixture is fragrant.
Pour in the chicken or fish stock and tucupi. Bring to a simmer.
Stir in the rehydrated dried shrimp and tapioca pearls (if using).
Simmer for about 10-15 minutes, or until the shrimp are cooked through and the tapioca pearls are tender.
Stir in the jambu leaves (or spinach). Cook for an additional 5 minutes, until the leaves are wilted.
Add salt and black pepper to taste.
Garnish with chopped fresh cilantro.
Ladle the soup into bowls.
Top with sliced red chilies and green onions.
Enjoy your meal!