1
Wash and dry all produce.
Trim green beans if necessary, then halve crosswise. (TIP: To do this quickly, line up several beans and slice at once.) Quarter lime.
In a small bowl, whisk together ¾ cup cold water (1¼ cups for 4 servings) and cornstarch until dissolved. Whisk in hoisin, soy sauce, a big squeeze of lime juice to taste, and as much sriracha as you like.