Heat pan over medium heat and melt butter.
Add chopped onion to pan and cook 2-3 minutes.
Add cauliflower rice and cook another 3-4 minutes.
Add kale and garlic, cooking another 3-4 minutes.
Make a well in the middle of the pan and add beaten eggs and stir to combine and until eggs cooked.
Finally, add in cooked rice and tamari.
Top with nuts, if using.