Cook the noodles in boiling salted water according to package directions; drain and set aside.
In a medium bowl, whisk together the peanut butter, soy sauce, rice vinegar, honey, ginger, garlic, sriracha, and warm water until the sauce is smooth and emulsified.
Heat olive oil in a large skillet or wok over medium-high heat.
Add the chicken pieces to the skillet and cook for 6 to 8 minutes until golden brown and the internal temperature reaches 165°F (74°C).
Add the broccoli and red bell pepper to the skillet and sauté for 3 to 4 minutes until the vegetables are crisp-tender.
Reduce the heat to low and add the cooked noodles and peanut sauce to the skillet.
Toss the ingredients thoroughly until the noodles and vegetables are evenly coated and the sauce has thickened slightly.
Divide into bowls and garnish with chopped peanuts and sliced green onions.