Drain the tuna well. Mix all ingredients together in a shallow bowl. If you like, you can season with a little thick balsamic vinegar.
Weigh out the fish batter and divide the weight by 6. Now weigh six portions (it should be 70 g per meatball), shape into meatballs and place them in a six-cup muffin tin, which is also lined with paper liners.
Bake in a hot oven at 180 ° C for about 30 minutes.
The consistency of the meatballs is a little softer than beef meatballs.