Add two-thirds of the cherry tomatoes to a blender along with the kimchi, kimchi liquid, spring onion, soy sauce and rice wine vinegar. Blitz until completely smooth.
Using a fine metal strainer, strain the blended mixture into a large bowl. Stir through 1 tablespoon of the leftover tomato–kimchi pulp, then add the dongchimi broth. Refrigerate to chill while you prepare the remaining ingredients.
Slice the remaining cherry tomatoes in half and set aside.
Cook the noodles according to packet instructions, then rinse thoroughly under cold running water to cool them down and remove excess starch.
To assemble, divide the cooked noodles between two bowls. Add a handful of ice to each bowl — this is essential for keeping the broth icy cold.
Pour over the chilled tomato kimchi broth, then garnish with halved cherry tomatoes, spring onion and jammy eggs. Finish with a drizzle of sesame oil and a sprinkle of toasted sesame seeds.