Tiger Fruit Salad

Name: Tiger Fruit Salad
Ingredients: 1 lb. underripe stone fruit (such as plums, nectarines, or peaches), pears, or mangoes, thinly sliced; 1 serrano chile, seeds removed if desired, thinly sliced; 2 Tbsp. unseasoned rice vinegar; 1 Tbsp. sugar; ½ tsp. kosher salt, plus more; 1 bunch cilantro; 4 scallions, thinly sliced on a diagonal; 2 celery stalks, thinly sliced on a diagonal; 2 tsp. toasted sesame oil; 1 tsp. low-sodium soy sauce; Zest of 1 lime; 2 Tbsp. toasted sesame seeds; Lime wedges (for serving)