I use a lot of the Morningstar farms frozen foods.

I've also discovered Gardenburger brand. They are putting out everything from "ribs" to "meatloaf" to "meatballs", sausages of different varieties, etc. all in the frozen food section. They are awesome!

I am on the Insulin Resistance Diet and though these foods vary in carb content, they still fit nicely into my plan.