Add chopped potatoes to a bowl of water and soak for 10 minutes. Drain and pat the potatoes dry.
Mix sauce ingredients in a bowl and set aside.
Heat oil in a skillet over medium high heat. Add potatoes and cook undisturbed until browned on the bottom. Flip potatoes and brown the other side.
Add garlic and cabbage and cook 1 minute, stirring frequently.
Stir in sauce. Bring to a boil then reduce heat to medium low. Cover and simmer until potatoes are tender, about 10-15 minutes.
Turn off heat and garnish with green onions, sesame seeds, and a drizzle of sesame oil.
Video
Notes
Gochujang: Some gochujang contain wheat or are manufactured in a facility that processes wheat. If you are strictly gluten-free, be sure to look for gochujang advertised as gluten-free.