In 1-quart saucepan, mix 1/2 cup water and remaining 1/2 cup bean sprouts. Bring to a boil; lower heat, simmer 2 minutes or until sprouts are thoroughly cooked and no longer crisp. Stir in peanut butter and hot chili sauce; cook over medium-low heat, stirring constantly, until thoroughly heated. Remove from heat. Stir in remaining 1/3 cup green onions.