1. Take the smoked mackerel out of the refrigerator.
2. For the noodles, bring a large amount of water to a boil in a pot.
3. Slice or crush the garlic.
4. Cut the leek into thin slices.
5. Remove the seeds from the red chili pepper and slice it.
6. Crush the peanuts.
7. Flake the mackerel using two forks.
8. Heat the wok or sauté pan over medium heat and toast the grated coconut and peanuts without oil.
9. Set aside outside of the pan.
10. In the same wok, heat the sunflower oil and sauté the garlic and red chili pepper for 1 to 2 minutes over medium heat.
11. Add the leek, soy sauce, and white wine vinegar and continue cooking for 4 to 5 minutes, stirring.
12. Add the snow peas and continue cooking for 4 to 5 minutes, stirring.
13. Meanwhile, cook the noodles covered for 3 to 4 minutes in the pot.
14. Drain, reserving some cooking water.
15. Add the noodles to the wok along with half of the mackerel and the peanut-coconut mixture, as well as 1 tablespoon of cooking water per person.
16. Continue cooking for 1 minute over high heat, stirring, then season with salt and pepper.
17. Serve the dish on plates and garnish with the remaining mackerel and peanut-coconut mixture.