Cut 2 or 3 squares of parchment paper slightly smaller than your dehydrator trays, set aside.
In a small food processor, combine onions and mushrooms, blitz until very finely chopped. Add remaining ingredients - except for the chicken - and blitz until smooth.
In a medium mixing bowl - using freshly washed or gloved hands - combine potato and onion mixture with the ground chicken. Mix it REALLY well - for best results, it’s better to overhandle it, than to under-mix it.
Use a spoon to load the mixture into a jerky gun, taking care to avoid creating air bubbles.
Line your dehydrator racks with the cut parchment paper, then pipe potato sausage jerky strips out onto them, leaving some space in between each.
Dehydrate in a food dehydrator at 165 F for 2 hours.
Once two hours has passed, remove the ground chicken jerky strips from the parchment, flip them over, and place them directly onto the wire rack.
Return to the dehydrator and continue dehydrating at 165 F for another 2 - 3 hours. (Actual time will depend on the thickness of the potato sausage jerky strips.)
To test for doneness, remove a piece of jerky from the dehydrator and let it cool to room temperature. It should feel dry to the touch and be able to bend to 90 degrees without breaking. (A bit of cracking or crackling is ok!)<
Allow potato sausage jerky to cool COMPLETELY to room temperature before packaging.