This was delicious and flavorful just following the directions. I used spicy brown mustard instead of dijon and probably about 2 tsp instead of one. Otherwise followed the directions! My only complaint is that the pasta soaked up so much of the sauce during the baking that it was a bit dry. I may not bake it next time but just broil the top to get the bread crumbs crispy since everything else is already cooked. It definitely satisfied my mac & cheese craving!