01 - Preheat oven to 400°F. Halve the spaghetti squash lengthwise and scoop out the seeds. Brush the cut sides lightly with oil, place face-down on a baking tray, and roast for 35–40 minutes until fork-tender.
02 - While the squash roasts, whisk together the gluten-free soy sauce, oyster sauce, sesame oil, rice vinegar, honey, and Sriracha in a small bowl until well combined. Set aside.
03 - Heat 1 tablespoon of vegetable oil in a large skillet or wok over medium-high heat. Add the thinly sliced chicken breasts and cook for 5–6 minutes, turning occasionally, until golden brown and cooked through. Transfer to a plate and set aside.
04 - Add the remaining tablespoon of oil to the same skillet. Add the minced garlic, grated ginger, shredded carrots, sliced bell pepper, and trimmed snap peas. Stir-fry for 3–4 minutes until the vegetables are crisp-tender.
05 - Once the roasted squash is cool enough to handle, use a fork to scrape the flesh into long, noodle-like strands.
06 - Add the shredded spaghetti squash to the skillet with the vegetables and toss to combine. Return the cooked chicken to the pan.
07 - Pour the prepared sauce over the entire mixture and toss everything together thoroughly. Cook for an additional 2–3 minutes until heated through and the flavors are well melded.
08 - Transfer to serving plates and garnish with sliced green onions and sesame seeds if desired.