Toss chicken with cornstarch, seasonings, and avocado spray. Air fry at 390°F for 12–14 min, shaking halfway.
Whisk yogurt, mayo, chili sauce, sriracha, vinegar, and lime for the sauce.
Cook spaghetti to al dente, drain.
Sauté onion, bell pepper, garlic. Add noodles, soy, oyster sauce; toss until coated.
Divide chow mein into 5 bowls, top with chicken, drizzle with sauce, garnish with green onion + sesame seeds.
