Soak the bean thread noodle in a hot water for about 10 minutes. Bring a small pot of water to a boil and then briefly cook the noodle for about 1 minute and discard water and rinse with cold water. Cut into shorter pieces with kitchen shears. Set aside
Place the Szechuan peppercorns on a pan without oil and roast until fragrant, but take care not to burn it. Remove from the heat and grind into a powder and set aside. Peel the English cucumber, halve lengthwise, scoop out the seeds and then thinly slice
Bring a large pot of water to a boil. Add in chicken pieces and boil until cooked through. Remove from the pot and when cool enough, place it on a cutting board. Use a rolling pin and pound the chicken to your heart content (my favorite part) and then slightly pull the meat apart to roughly shred it
In a large serving bowl, add in all the sauce ingredients. Whisk to make sure everything is mixed and sugar is dissolved. Add in the chicken, noodles, and cucumber. Lightly toss to make sure the sauce coats everything in there. Garnish with sesame seeds and sprinkle of Szechuan peppercorns. Can be served cold or room temperature