-
1
Mince 2 of the garlic cloves. In a large pot over medium heat, heat oil. Add onion, fennel, celery, 1/2 teaspoon salt, and 1/4 teaspoon pepper and cook, stirring occasionally, until softened, 6 to 8 minutes. Add the minced garlic and red-pepper flakes. Continue to cook, stirring constantly, until garlic is golden and fragrant, 1 to 2 minutes more.
-
2
Reduce heat to medium-low and add squid. Cook, stirring occasionally, until squid is opaque and tender and the released juices reduce, 15 to 20 minutes. Add tomato paste and oregano and cook, stirring, 1 minute.
-
3
Add wine, raise heat to medium-high, and cook until cooking liquid is reduced by half, 5 to 7 minutes. Add tomatoes with their juice, bay leaves, clam juice, and stock. Bring to a boil, reduce to a simmer, and cook, covered, 30 minutes. Stir in 1/4 teaspoon each salt and pepper. Taste and adjust seasoning.
-
4
Meanwhile, in a small bowl, mix the butter, 1 tablespoon parsley, lemon zest, and 1/4 teaspoon salt together. Cut remaining garlic clove in half and rub the cut sides on the toasts. Spread the flavored butter on the toasts.
-
5
When ready to serve, heat the pot to medium and add clams, cover, and cook for 3 minutes. Stir in the shrimp and mussels. Arrange the fish on top of the stew, cover, and simmer until shellfish opens and fish and shrimp are firm and opaque, about 5 minutes more. Discard bay leaves and stir in remaining 2 tablespoons parsley.
-
6
Serve cioppino immediately in large soup bowls with gremolata toasts alongside.
