Preheat the oven to 375ºF. Slice the spaghetti squash in half*, drizzle lightly with olive oil and place cut sides down on a baking sheet lined with parchment paper. Roast for 45 minutes or until fork tender. Scrape out the "spaghetti" strands into a large bowl and set aside.
Add the cooked chicken, bacon, spinach, ranch, and spices to the spaghetti squash and stir to combine. Season with salt & pepper to taste, then transfer to a greased 9 x 13 baking dish.
In a small bowl, whisk the eggs. Pour over top of the spaghetti squash mixture and use a fork to mix in until combined.*
Transfer to the oven and bake for 40 minutes or until completely set (not soft in the center).
Slice into 6 to 8 servings & enjoy!