Add all of the ingredients for the gluten-free meatballs to a mixing bowl and mix everything together. I added flaxseed meal instead of breadcrumbs to keep them moist and bound.
Remove the meatballs from the pan and leave any grease behind. This adds much more flavour than another oil. Add the onions and mushrooms to the pan and begin to sauté them.
Serve these gluten-free meatballs over mashed potatoes or your favourite gluten-free noodle. They're keto friendly so serve them over cauliflower mash for a low carb option.