Are you adding parmesan rinds to your casseroles? They add a lovely flavour to any recipe.
Whenever you finish a chunk of parmesan cheese, I suggest you pop the rind in a ziplock bag in the freezer. And next time you make a casserole, pop one of the rinds into the pot (no need to thaw, just stick it straight in).
You'll thank me for it.
photo source: here