Bring to a boil, stirring often. Reduce the heat and simmer, uncovered, about 15 minutes, until the tomatoes break up and the mixture becomes a sauce. Meanwhile, cut into bite-sized pieces:
1 octopus (about 3 pounds each) precooked, or 3 pounds squid or cuttlefish, cleaned
Stir the seafood into the sauce and simmer until it is hot and tender, less than 5 minutes. Taste and adjust the seasonings. Garnish with:
Minced fresh basil, parsley, or fennel leaves
Serve with:
Crusty bread or hot cooked rice or hot cooked pasta