Pre-heat oven to 425°, line a medium/large baking sheet with aluminum foil & lightly spray with cooking spray.
Slice your spaghetti squash in half lengthwise and scoop out the seeds. For easier cutting, you can stick each squash in the microwave for 5 minutes to soften it up.
Spray the halved squash with cooking spray or olive oil, season with a dusting of salt, pepper and garlic powder. Place cut side down on aluminum-lined baking sheet.
Roast for 30-40 minutes, or until tender and easily pierced with a fork. Remove from oven and allow to cool.
In a bowl, combine shredded chicken, 1 cup cheese, hot sauce, goddess dressing, white ends of the green onion, Greek yogurt, jalapeño, red onions, 1 tsp salt and 1/2 tsp pepper. Stir to combine.
Once squash has cooled a little, use a fork & scrape the side of the spaghetti squash bowls to release the strands of squash.
Add the stringed squash to the bowl with the chicken mixture. Season with salt & pepper and stir to combine. *it depends on how creamy you want it, but left about 1½ cup of stringed squash out of the mixture because my squash were a little big and I wanted a creamy chicken/squash ratio*
Evenly divide the mixture between each squash shell. Top each squash with a little extra cheese on each boat and place face-up on your baking sheet.
Bake at 350° for around 20 minutes or until hot and bubbly. For golden bubbly cheese, change oven setting to broil on high and broil for 2-3 minutes, watching closely so it doesn't burn.
Garnish with chopped green onion, fresh diced tomatoes, a drizzle of dressing, and even extra hot sauce, if desired