In a large bowl, mix all the meatball ingredients (except toasted sesame oil) together, until well combined.
Place toasted sesame oil in a skillet and heat over medium heat.
Brown meatballs for about 5-6 minutes on each side, until almost cooked through.
Remove meatballs from skillet.
Add onions and peppers to the skillet and sauté until vegetables are tender.
Mix tomato paste, xylitol, garlic salt, rice vinegar, liquid aminos, and water.
Place the meatballs back in the skillet, then pour the sauce over the meatballs and pepper mixture.
Cover with a lid, turn heat down and simmer for 10-12 minutes, or until sauce has reduced some and meatballs are cooked through.
Serve with cauliflower rice.