Cut the mackerel fillet and aged kimchi into bite-sized pieces.
Slice the garlic thinly.
Heat olive oil in a pan and sauté the garlic.
Add the mackerel fillet and cook.
Add the aged kimchi and stir-fry together.
Boil the pasta and add it to the pan.
Add soy sauce, black pepper, and some pasta cooking water, then mix well.
Toss everything well, plate it, and finish with parsley.