In a dish combine the 1/2 cup Arrowroot with 1/2 tsp Pink himalayan salt.
In another dish combine the 1 cup Buttermilk, 1 Egg and 1 tsp Worcestershire sauce.
In a third dish combine 1 1/2 cup Einkorn flour, 1/2 cup Arrowroot, 11/2 cup Panko, 1 tsp Garlic powder, 1 tsp Pink himalayan salt, 1/2 tsp Mustard powder 1 tsp Onion powder, 1/4 tsp Ground cayenne pepper.
Set these up in a line and pull out the 12 Chicken tenderloins. First dunk a chicken tenderloin in the arrow root and salt, then into the egg wash and finally into the breaded coating.
Place onto a parchment lined baking sheet.
After they all get one coat, dunk into the egg wash again and then the breading again. Place back on the parchment paper and flash freeze for 2 hours.
Transfer to a freezer safe ziploc bag and store up to 2 months.