Sun-dried tomatoes would be good, just keep in mind tomatoes are kind of carby, and use accordingly. I've dried a lot of tomatoes in the past and it's a great way to preserve them. In fact, it brings to mind a special 'pink' sauce I always used them in for pasta, which would be very low carb, indeed (the sauce, not the pasta. ) I also liked them cut up into salads. Yum!

Different processed cheeses use different ingredients. Basically, the cheese is mixed with other ingredients. If the ingredients look safe and the carb count is within cheese limits, then I don't think a little is going to hurt.

Salt? Hmmm. Not craving any salt. Maybe you aren't getting enough in your food. It seems like every few days I end up getting way too much!