I'm looking to reduce my carb intake

I'm mostly looking for a pasta substitute. I usually make a batch of sauce, hamburger, and pasta that will last me for 3 or 4 days out of a week.

I was thinking of just getting some frozen cauliflower, steaming it and chopping it up and just toss that in. I've never tried that and wanted to get opinions on how that might taste.

I'll take any other (easy) suggestions for pasta and maybe bread substitutes tho.