When changing your diet to make old favourites more healthy often small changes go a long way to make them higher in fibre and lower in carbs. For this dish cauliflower was an obvious choice in vegetable. It is low in fat and carbs and gives you the extra benefit of potassium (176.1 mg of potassium in just one cup).
You can choose to go the route of enriched pasta fettuccine or as shown in the photo substitute spaghetti squash instead of pasta. If you want to add meat try adding shredded left over chicken breast.
The sauce can be used in so many other ways. Try it on baked potatoes with some broccoli, lasagna, potato au gratin or even as a warm dip.
Enjoy!