Sichuan chicken with choy sum and rice noodles

Ingredients

• 2 tablespoon sichuan peppercorns
• 1 tablespoon sea salt
• 4 chicken thigh fillets, cut into thirds lengthways
• 1 tablespoon peanut oil
• 500 gram packet fresh rice noodles
• 1 bunch choy sum, trimmed, rinsed, halved lengthways
• 1/4 cup water
• 2 tablespoon soy sauce
• 2 tablespoon sweet chilli sauce
• 1 clove garlic, sliced
• 1 teaspoon shredded ginger