My mom makes this so I'm not sure where she got this from. We have it for special occasions. The sauce is so good we pour it over the potatoes and meat. I serve this with whole kernel corn.
**Note: I made the correction from original recipe that you don't need flour**
I have seen a few variations on this recipe from Kraft but this one is pretty easy and yummy as I love ketchup and mustard!! I serve with a buttered slice of bread and either sliced tomatoes or SteamFresh green beans for the side dish.