Step-by-Step Method
Prepare the Ingredients:
Dice the onion, carrot, celery, and garlic. Clean and chop the fish, shrimp, mussels, and clams. Set aside.
Sauté the Vegetables:
In a large pot or Dutch oven, heat the olive oil over medium heat.
Add the diced onion, carrot, and celery. Sauté for about 5-7 minutes until the vegetables are softened.
Add Garlic and Spices:
Stir in the minced garlic and red pepper flakes (if using) and cook for another minute until fragrant.
Incorporate Tomatoes and Stock:
Pour in the diced tomatoes (with juice) and the fish stock. Add the bay leaf, oregano, salt, and pepper. Bring to a simmer.
Simmer the Base:
Allow the stew to simmer for about 15-20 minutes, allowing the flavors to meld together.
Add the Seafood:
Carefully add the white fish, shrimp, mussels, and clams to the pot. Cover and cook for another 10-15 minutes until the seafood is cooked through and the mussels and clams have opened. Discard any that do not open.
Finish and Serve:
Stir in the chopped parsley and lemon juice just before serving. Taste and adjust seasoning if necessary.
Serve:
Ladle the Caciucco into bowls and serve hot with crusty bread on the side.