As someone that’s had to do a liquid diet before, check the seniors food delivery for options. They’re savory, nutritionally balanced (for seniors), and come in a variety of thicknesses. Apparently it’s common for some seniors to have swallowing difficulty.
Your mileage may vary based on your local options but it was a butt saver at the time.
Also blending some of my favourite meals with a broth (technically you could use ensure) was a more palatable way of working back up to solids.
If I had the money I’d want to try staffing it with cult deprogramming specialists. It would be an interesting experiment to track.