Cook noodles of choice in a pot of boiling water. Drain and set aside, reserving some of the noodle water.
To a heat-proof bowl, add the garlic, gochugaru, sesame seeds, and spring onions.
Gently heat 1.5 tbsp of hot oil and once hot, pour it over the chilli-garlic mixture. Let it sizzle for a few minutes, then whisk in the remaining ingredients: gochujang paste, peanut butter or tahini, rice vinegar, lime juice, soy sauce, miso (optional), and sugar.
Taste and adjust according to preference, for instance adding more lime juice for a zing. You could even add a dollop of your favourite hot sauce to amp up the heat.
Now mix in the noodles along with a splash of the noodle cooking water. Toss until evenly combined and serve with more spring onions and sesame seeds for garnish.
