Pork jowl is optional
Boil the spaghetti noodles.
Finely chop onion and garlic.
Heat olive oil in a pan and sauté the garlic and onion.
Add bacon and cook together.
Add miso paste and a little pasta water to make the sauce.
Add the boiled noodles to the pan and mix with the sauce.
Sprinkle with black pepper, mix well, and finish.