This is simple! I am focused on dehydrating many things this year. So keep an eye on my blog for more ideas.
I just placed half an onion into my food processor and pulsed until all pieces were similar in size.
Then place onions onto a parchment paper lined tray for your dehydrator so the little pieces don't fall through.
It will take around 14 hours to finish dehydrating. Just make sure before taking onions off the tray they are crispy all the way through!