What is a suitable Low carb rice alternative?
Quinoa. I only recently discovered it as part of doing P90X, and man, it's so, so delicious. It's kind of a nutty flavour that goes really well with sauces. It's also pretty high in protein, which is good.

Note that this isn't "no-carb", though it is lower in carbs than rice.

It's important that you wash quinoa before you prepare it. Otherwise, it's prepared in a very similar way, 2-1 water-to-quinoa, boiled and simmered.