Prawn Udon Noodle Soup Inspired By Deliciously Stella

Name: Prawn Udon Noodle Soup Inspired By Deliciously Stella
Ingredients: 4 cups chicken stock (homemade if possible, or picked up from your local butcher); 2 tsp sesame oil; 1 inch of freshly grated ginger; 1 clove garlic (crushed); 3 tbsp soy sauce; 2 tbsp mirin; 1/2 red chilli chopped; glug olive oil; salt and pepper; 1/4 tsp dried chilli flakes; 250 g udon noodles or ramen noodles; 4 eggs; 4 baby pak choi (pulled apart into separate leaves); 400 g prawns; 2 spring onions (sliced); 1/4 red chilli (finely sliced)