Is it safe to vacuum seal shredded Parmesan?
In the past, I have found that simply grating it into a Tupperware or similar container, placing the lid on it, and placing it in the freezer will hold the flavor well of grated Parmesan. It has been how I have always stored it when I bought it. Because of the grating, and the nature of cheese it has never taken long for it to thaw out if you are using it for things like a salad. A vacuum jar placing it in the refrigerator would probably work as well, just more work between each use as compared to just placing the container back into the freezer.