Spaghetti squash is a great low carb alternative. You'll need to make the right recipe. however!
See my low carb dishes using the "low carb" tag on Flickr.
See more low carb suggestions via my Pinterest board,
"Health Foodie, Low Carb" here: pinterest.com/dnrevel/healthy-foodie-low-carb/
The science of this approach is best explained by Gary Taubes, a New York Times science writer, author of "Good Calories, Bad Calories." Recent science is also pointing to sugar and refined wheat flour being the true culprits of heart disease, due to inflammation.
Find out more about me via "Deb Nystrom" and REVELN (my day job)