Add all ingredients into a mixing bowl, and mix well.
Add a splash of water if it seems too dry, but the fish should give it a lot of moisture.
Sprinkle some rice flour on a large plate.
Roll the mixture into round balls and flatten slightly into patties of about 6 cm in width, and place on the plate to rest.
Cover the dish with wrap or a food saver, and rest the patties in the fridge for about 3 hours. (Optional, they are delicious right away too.)
Heat up the coconut oil in a deep pan.
When you hear about 2 pops, you can turn the heat to medium and start frying.
Ensure that the patties are slightly golden on each side. Tuna can be eaten raw, but with meatballs it is best if just slightly slightly pink in the middle rather.
Enjoy as a burger patty, or in a wrap with an aioli sauce. Or with a side dish of rice salad and a light mayonnaise dressing. Or just snack on it during the day! Absolutely delicious!