Pike in a tangy green sauce is a traditional Mantuan freshwater fish dish. This high protein mediterranean meal is a fresh, healthy family dinner from the Po Valley's culinary heritage.
Rinse the pike fillets and pat dry. Bring a large pot of water to a gentle simmer and add whole onion, celery stalks, bay leaves, and a generous pinch of salt.
Slide in the pike fillets, lowering the heat to maintain a gentle simmer. Poach for 20 minutes until the fish flakes easily but is still moist inside.
Carefully remove fish and drain well. Let cool slightly, then flake the pike into large chunks, discarding any bones or skin.
While the fish cools, finely chop parsley, capers, and garlic. In a bowl, whisk together olive oil, white wine vinegar, garlic, chopped capers, parsley, salt, and pepper to create the green salsa.
Arrange flaked pike on a serving platter. Spoon the tangy green salsa over the fish, cover, and let marinate in the refrigerator for at least 30 minutes before serving for maximum flavor infusion.