Heat a large skillet over medium - low heat for 2 minutes.
Add the sunflower seeds and spread them out so they are in a single layer. Cook for 5 minutes, stirring often.
Evenly pour the soy sauce or tamari over the seeds, stir, and cook for an additional minute or two. Some of the soy sauce will stick to the skillet, that’s okay, just stir the seeds around.
Turn off the heat, transfer the seeds to a plate and cool. Store in a glass jar in the fridge.