Make the spaghetti squash first (see notes below).
Preheat the oven to 425 degrees.
Lightly coat a medium-sized baking dish with olive oil. (I believe mine is a 10x7 dish)
Make your "mayo" by placing the 2 egg yolks, lemon juice, olive oil and Himalayan Salt in a medium bowl and beat together by hand with a fork. Set aside.
Drain the two cans of tuna. (Do not drain if using Wild Planet.)
Add the tuna to the "mayo" and mix together.
Take the spaghetti squash out of the slow cooker. Cut in half. Scrape out 5 cups of spaghetti squash. (If you have leftovers, keep it in the fridge until you're ready to eat. Here is another recipe using spaghetti squash that you might like.)
Place the 5 cups of spaghetti squash in a large bowl. Add the tuna/mayo mixture. At this point, also add the Coconut Milk, Nutritional Yeast and a little more salt (if desired, I added about ¼ tsp more). Stir and mix.
Transfer entire mixture to the baking dish.
Bake for about 18 minutes.
Sprinkle a little more Nutritional Yeast on top, return to the oven and bake for another 4 minutes.
Stir the dish a little, return to the oven and bake for a final 4 minutes.