Place spaghetti squash in oven at 350° to bake about 1 to 1 ½ hours.
If using uncooked chicken, see note below and follow directions.
Meanwhile, heat a large sauté pan on medium burner.
Add olive oil.
Add celery, carrot chips or slices and green beans and cook 3-5 minutes with lid covered.
Add mushrooms, peppers, onions, and Serrano pepper and cook about 3-5 minutes with lid covered.
Add broccoli, zucchini, and seasonings.
Then add chicken.
Continue cooking with lid covered until vegetables are cooked crisp-tender.
You don’t want them soggy or overcooked. It is better if they are slightly crisp to taste rather than limp.
Meanwhile, remove squash from oven when done.
Slice in half on bread board, remove seeds carefully.
Using a fork remove the meat of the squash and place in serving bowl.
To serve, spread spaghetti squash on a plate.
Top with chicken and veggies.