Drain sardines and cut into large pieces. Combine ketchup, onion, oregano, and garlic powder. Mix thoroughly. Cut rolls in half and spread with butter. Place rolls on a cookie sheet and toast them lightly in the oven. Place sardines on rolls and cover with ketchup mixture. Sprinkle with cheese. Bake in a moderate oven, 350 F for 10 to 15 minutes, or until cheese melts.

Dave's notes: Dump the ketchup, oregano, and garlic powder and open up a jar of Ragu Pizza Quick Sauce, adding the onions. It tastes a lot better than the "dumbed down" tomato sauce Uncle Sam came up with using ketchup.

From "Flavor of Maine - Sardine Secrets", Us Dept. Of the Interior, 1968 Mm and comments by Dave Sacerdote