Take out your frying pan. Place in the pork belly pieces while the frying pan is cold! After the pieces are laid-on, put it on a medium heat. (If the meat starts in a cold pan, it releases more grease - which is what we want)
Season each pork belly piece with a sprinkle of Salt and Black Pepper. Once the bottom-side is slightly crispy, give each piece a flip. Now add-in the chopped garlic pieces. Let it cook on the other side - with the garlic - for 1-2 minutes.
At this point, you'll see a good amount of grease accumulated in the pan. Carefully discard the grease by emptying it out into a mixing bowl. Or you can mop it up with a few paper towels.
Now, lets continue. Add-in the Sugar (1 Tablespoon). Stir-fry it around for ~10 seconds.
Next, add-in Soy Sauce (2 Tablespoons). If you're cooking on a gas stove, tilt your frying pan so that the flames can slightly scorch the soy sauce - do this for only 4-5 seconds! (Don't do it for too long - or the Soy Sauce will burn).
Aftewards, immediately add in the Chopped Spring Onion, Chopped Chili Peppers and Gochugaru (1.5 Tablespoon). Stir-fry it around for 10-15 seconds.
Now, add in ¼ cup of water. This will turn the mixture from oily to slightly saucy. Stir-fry everything for a final 10-15 seconds. Turn off heat.
Crack in some Black Pepper (4-5 cracks) and finish with Sesame Oil (½ Tablespoon). Give it a final stir!
Garnish with a few shakes of Sesame Seeds.
Serve with a bowl of hot rice! And Bon Appetit ;-)