This is from one of my favorite cookbooks, Mom’s Updated Recipe Box: 300 Family Favorites Made Quick and Healthy. That links to a book that is slightly newer than my copy as it has 50 more recipes in it! It’s a great collection of family favorites tweaked to be a bit healthier than the older versions of some of these recipes.
The mustard is not overwhelming in this recipe but adds a nice tang to the sauce. If you like the sauce, try it on other vegetable combinations. The picture doesn’t really do the dish justice. It was a hit at our table with a guest and my teenager.