Poached Chicken in Lemongrass Broth

Name: Poached Chicken in Lemongrass Broth
Ingredients: 60 grams palm sugar; 1 stick lemongrass, (white part only) cut into 2cm rounds then cut horizontally in half; 20 grams fresh ginger; 40 grams soy sauce; 2 pieces star anise; 2 tablespoons Vegetable stock paste, (from Basic Cook Book); 4 pieces Kaffir lime leaves, plus extra for garnishing; 1 litre water; 400 grams chicken breast fillets, thinly sliced; 200 grams green beans, trimmed and cut into pieces about 3-4cm long; 350 grams noodle, udon