In a heavy saucepan heat the vegetable oil over medium-high heat. Add onion and garlic, and cook, stirring, for 10 minutes. Do not let them color. Add aji amarillo paste and tomato, and cook 10 minutes longer.
Incorporate the fish stock, coriander paste, bring to a boil and cook for a few minutes. Add potatoes, rice, corn, red peppers, and green peas. Season with salt and pepper. Lower the heat and cook partially covered until the potatoes and rice are tender.
Finally add the fish, cook for 3 – 4 minutes or until the fish is cooked through. Turn off the heat and serve immediately.
Recipe by PERU DELIGHTS at https://perudelights.com/aguadito-de-pescado-a-dreamy-and-aromatic-soup/