In high heat, blanche the chicken for 2 minutes, then drain.
Place chicken back into the pot and add water. Bring this to a boil.
Once boiling, season the chicken with pepper flakes, pepper powder, pepper paste, soy sauce, corn syrup, sugar, garlic, ginger, mirin, oyster sauce, sesame oil, and black pepper. Mix this thoroughly and simmer for 15 minutes.
Meanwhile, prepare the vegetables.
Add the potatoes, carrots, onion, and jalapeƱo. Let it braise on medium-high heat for 25 minutes. Add the scallions in the last 5 minutes.
Occasionally stir the chicken to prevent sticking on the bottom and the sugar from burning. Baste the sauce in the chicken as well.
Once the chicken and potatoes are fork-tender and the sauce has thickened, it's done.
Serve with rice and enjoy!