Preheat the oven to 400 degrees. While this is heating, combine all the meatball ingredients into a bowl. Mix until combined, but be sure not to over mix.
Use a spoon or small ice cream scoop to form the meatballs. Place the meatballs on a sheet pan coating in non-stick spray. Place the pan in the oven and cook for 10 minutes.
While the meatballs are cooking, heat a large pot to medium-high heat with 1 tablespoon avocado oil. Put carrots, onions, and celery in and saute for 5 minutes.
Add minced garlic, Italian seasoning, salt, pepper, chicken broth, vinegar, and lemon juice to the pan. Bring this to a boil- this should take about 10 minutes.
When the meatballs are done add those to the soup pot. Then add kale and cauliflower rice to the pot. Simmer for another 10 minutes.