Udon with Chicken and Garlicky Peanut Dressing

Name: Udon with Chicken and Garlicky Peanut Dressing
Ingredients: ¼ cup natural creamy peanut butter; ¼ cup soy sauce; ¼ cup unseasoned rice vinegar; 1 tablespoon honey; 1 garlic clove, finely grated; ¼ cup vegetable oil; 8 ounces dried udon noodles; Kosher salt; 8 ounces shredded rotisserie chicken (about 2 cups); 1½ cups thinly sliced celery hearts and leaves; 1½ cups mung bean sprouts; 1 small daikon (Japanese white radish), peeled, cut into matchsticks; 2 teaspoons black and/or white sesame seeds; Chili oil (for serving)