Preheat oven to 400°.
Slice spaghetti squash in half, lengthwise and scoop out seeds.
Place each squash cut side up and drizzle with olive oil, and sprinkle with some salt.
Turn squash over so they are cut side down. Bake in preheated oven for 40 minutes.
In the meantime, heat some olive oil over medium high heat and add onion and green pepper. Cook until tender. Take off heat when done.
In a bowl, mix together shredded chicken and bbq sauce. Set aside.
When your squash is done, let cool so you can safely handle it.
Using a fork, loosing the spaghetti squash strands and place them in the pan with the peppers and onions. Add the shredded chicken to the pan. Mix everything together and stuff back into squash evenly.
Sprinkle evenly with shredded cheddar.
Lower oven to 350°. Bake squash for 10-15 minutes, until cheese is melted. Drizzle tops with bbq sauce and ranch dressing. Garnish with green onions (optional).
Enjoy!