Ive done low sodium at times when I am doing a lot of cooking and my body is saying to back off. I actually think its pretty good and satisfying. If you google low sodium herb rubs you will find a lot of recipes or you can just go to grocery store and get Mrs Dash herb rubs. As example, when Ive done low sodium with red meat I like Herbs de Province. Save whatever sodium you will add until its cooked and plated to get the salt flavor, but drastically reduced. Be careful of bottled sauces, there are a lot of healthier options out there now, but usually high in sugar and sodium.
Also, I havent done this yet, but @thirdeye mentioned in response to an MSG question I had yesterday that "Accent", or MSG, is low sodium and provides the same benefit to a cook. Im planning on mixing Accent 50/50 with salt to reduce sodium and help flavor. This may be something to research a bit more since your situation is medical and my question was more about flavor.
Good luck! I'll keep my eyes open for something low sodium to pass on, but a Mrs Dash Chipotle run is a decent quick option for now though!