
Preheat the oven to 350°F. Halve the zucchini and scoop out the innards, leaving a wall ½ inch thick all around. Dice the flesh and put it into a large bowl. Put the shells into a shallow baking dish or casserole dish. Brown the beef with the onion; drain off any excess fat.
Combine the dried squash with the beef mixture, then stir in the parsley, oregano, salt, pepper, about half the Romano, the cheddar, crumbs, and about 1/3 of the tomato sauce. Mix well, then spoon into the shells. Spread the remaining tomato sauce over the tops, then sprinkle with the remaining Romano cheese. Bake at 350°F for 30 minutes. Serve hot.Serves 4.