Anyone have suggestions to prepare for this scenario?
I wouldn't store the brown rice meant for GABA longer than six months or replace more than half my vegetable intake with it (i.e. one probably shouldn't replace dark leafy greens and/or the broccoli family,) but that is still something like a compensation for 45% inflation in fresh vegetables.
The asparagus season might be a few weeks shorter, you may pay 3-5% more but ultimately no one is going to starve.
The best thing to do is prepare for slightly higher outgoings.
If you are in Sub-Saharan Africa continue doing what you're already doing, get on a dinghy and point it at Europe.