If you have not cooked the spaghetti squash, in a dutch oven or steamer, begin by fully steaming the spaghetti squash. Once it is steamed, scrape out the seeds with a fork. Then, use a fork to scrape out the remaining spaghetti squash and set aside.
In a medium sized skillet, place the oil and garlic in the skillet and warm up.
Add in the cooked spaghetti squash, cooked chicken, cucumber, tomatoes, peas, and onion.
Continue to stir and let simmer for 10-15 minutes until heated through and the veggies are tender.