Every village sooner or later gets to the stage when raw food just plies up endlessly, from hordes of veggie stockpiles to whole house floors full of meat cupboards. Along with that, once the village settles, heartlings eat basically 10 same dishes, usually made from easily farmable stuff. There's almost no variety based on season or region, as you can always just farm and stockpile more.
To change it H&H could implement what most other survival games do - food rots and you have to preserve it. Smoked and dries meats that can be used in recipes in place of raw ones, pickled veggies (more use for vinegar!), jams and candied fruits (no more barrels of barrels of honey). Maybe even snow as a way to stop spoilage of stuff that's in the cupboards.
With cooked dishes it could go from sizzling (bonus to FEP) to normal, to stale (minus to stats) and then create rot you can use for animal food or compost.