Shredded Chicken Breast and Noodle Salad

Name: Shredded Chicken Breast and Noodle Salad
Ingredients: 1 8-ounce skinless, boneless chicken breast; Kosher salt; 9 ounces udon noodles; 3 tablespoons tahini (sesame seed paste); 2 tablespoons unseasoned rice vinegar; 1 tablespoon soy sauce; 1/4 teaspoon dried crushed red pepper, optional; 2 carrots, peeled, very thinly sliced; 1 cucumber, thinly sliced; 2 scallions, thinly sliced, whites and greens separated; 1/2 teaspoon toasted sesame seeds