Chicken and noodle salad with Sichuan pepper

Name: Chicken and noodle salad with Sichuan pepper
Ingredients: Chicken and noodle salad; 2 free-range chicken breasts, about 500g total weight; 200g udon noodles; ½ cup coriander leaves; 1 tbsp sesame seeds, toasted; Chilli pepper dressing; 1 tbsp peanut oil; 1 tsp Sichuan peppercorns, plus extra to serve; 4 dried long red chillies; 1 tsp finely chopped garlic; 1 tsp finely chopped ginger; 1 tbsp chilli bean paste; 1 tbsp sweet bean paste; 2 tsp Shaoxing wine; 100ml chicken stock; 1 tsp dark soy sauce