Italian poached whole fluke

One of my favorite Italian dishes is sapore di mare, an Italian style seafood soup with tiny pasta.  While looking for that recipe, I came across this “Single Fish Cooked Fish-Soup Style” in one of my Italian cookbooks, so we tried it this evening.  Wash a whole fluke (gutted and scaled) in cold water, pat dry, and set aside. Separately, saute a chopped onion in ¼ olive oil, then add minced garlic, and then chopped parsley and ½ cup white wine.  Simmer for a minute, then add chopped Marzano tomatoes, bring to a boil, then reduce to medium (for a steady simmer) and cook uncovered, until sauce reduces.  Add whole fluke (at this point, I had to transfer everything to our largest roasting pan to accommodate the length of the fluke).  Bring to a boil, reduce to a simmer, cover (here, I used massive sheets of foil), and then cook until fish is flaky.  Serve with 7-grain pilaf, and watch out for pin bones.  This recipe is from
Essentials of Classic Italian Cooking by Marcella Hazan.  (Aug. 2013)