In the United States, Marinara sauce has come to mean a simple, vegetarian tomato sauce, but it isn't that way in Italy. Marinara means "in the mariner's style", which emphasizes thrift and availability of local, inexpensive ingredients, sometimes but not aways including some sort of seafood that might have been by-catch.
Remember that not all marinai were fishermen, and dinner might have been prepared at sea or back in port. This recipe provides a base from which you can unleash your inner galley-cook!