Prepare rice noodles al dente, according to package directions.
Whisk or shake sauce ingredients together until mostly smooth.
Heat oil in wok or large skillet over medium-high heat.
Add onions and saute until translucent.
Stir in chiles & garlic and cook for 1 minute.
Add chicken & fish sauce. Cook, stirring occasionally, until chicken is cooked through.
Stir in cherry tomatoes, green onions, & sauce. Cook for several minutes until tomatoes have softened.
Fold in rice noodles until they are fully coated with sauce, then cook for another minute to let the sauce soak into the noodles.
Remove from heat and fold in basil. Serve immediately.