SUBSTITUTIONS:No salmon? - You can use just about any other protein here. I've also made it with scrambled eggs, and it was delicious!No kimchi? - Kimchi is a bit of an acquired taste, so any crunchy vegetables would be great instead such as Persian or English cucumbers, carrots, or even quick-pickled vegetables.Soy-free? - use coconut aminos instead of soy sauce/tamari.