My daughter really likes this sandwich. She usually has 2 at a time. The mustard used in this recipe can only be found in Ontario, Canada as far as I know. So some Canadians will know it. You can substitute though. Just don't use the regular kind unless you want to of course.
A friend's mom passed this on to me. She and her husband had to relocate to Puerto Rico for his job and they spent quite a bit of time down there. When she came home, she brought a ton of new recipes to pass on to us. She and her husband had this at a small restaurant and they wouldn't give up the recipe. This is her take on it.
A popular southern way to make meatloaf sandwiches is to use butter or margarine instead of mayo. This great sandwich is a favorite for lunches and picnics. You can add lettuce, if you like, but it's good without "adornment".
We love grilled cheese sandwiches and tomato soup in our house and this is how we make our grilled cheese sandwiches. This recipe is per sandwich it turns out really crispy on the outside but creamy on the inside.
The source for this recipe is the cookbook Scandinavian Feasts by Beatrice Ojakangas. The author says this recipe was served at the Davidson Smorrebrod Shop, and an electrician ordered it so frequently, it became knows as The Electrician's Supper.