Preheat oven to 350°Treat a 9” square baking dish with cooking spray. In a large non-stick skillet over medium heat, brown beef, breaking it up as it cooks. Drain beef and reserve. In a large mixing bowl, combine eggs and milk. Add the corn, soft bread crumbs, onion, mustard, salt and fresh-ground pepper, and reserved beef; mix well. Transfer to prepared baking dish. Toss dry bread crumbs with butter; sprinkle over meat mixture. Bake uncovered for 30 minutes or until golden brown. Serves 6."