Adriatic fish stew simmered gently with tomatoes, wine, and fresh seafood. This high protein mediterranean dish is a fresh, healthy family dinner with regional variations all along Italy's east coast.
Heat the olive oil in a large, wide pot over medium heat. Add the sliced onion and cook gently for 4–5 minutes until translucent, not browned.
Add the garlic and cook for 1 minute more, stirring constantly to avoid burning.
Stir in the diced tomatoes with their juices, white wine, half of the parsley, sea salt, black pepper, and red pepper flakes. Simmer uncovered for 8–10 minutes, allowing the flavors to blend.
Raise the heat to medium-high and nestle the fish fillets into the simmering tomato broth. After 2 minutes, add shrimp, mussels, and clams, covering the pot to capture steam.
Cook for 6–8 minutes or until the shellfish have fully opened and the fish is just cooked through. Gently shake the pot once or twice during cooking and avoid stirring, to preserve the shape of the fish.
Remove from heat. Discard any unopened shellfish. Taste and adjust seasoning with additional salt and pepper if needed.
Sprinkle with remaining chopped parsley before serving hot with rustic bread, if desired.