Put the tuna fish into a large bowl. Add the garlic powder to the bowl.
Then add 1 Tbs of coconut cream/milk and mix. Add 1 Tbs of balsamic vinegar and mix. Keep adding the coconut cream/milk and balsamic vinegar 1 Tbs at a time and mix it until you have it all in there.
Add the diced red onion to the mixture, and then add salt and pepper to taste. Mix and then serve.