Preheat oven to 425 F.
Coat the inside of the squash lightly with olive oil; generously season with sea salt and freshly ground black pepper.
2 tbsp. olive oil, Sea salt and freshly ground black pepper, 1 spaghetti squash
Place on a baking sheet, and bake in the oven 30 to 35 minutes or until squash shreds easily with a fork.
In a bowl whisk together the tomato sauce and hot pepper sauce.
½ cup tomato sauce, ½ cup hot pepper sauce
In another bowl combine the shredded chicken, bell pepper, onion, and celery.
2 chicken breasts, 1 bell pepper, 1 onion, 2 celery stalks
Pour the tomato hot sauce on top and toss everything until well combined.
Fill the squash with the chicken mixture and place back in the oven 10 to 12 minutes.
Serve topped with sliced green onions.
1 green onion