Cut the chicken tenderloins into bite-sized pieces.
Season the chicken tenderloins with salt and pepper.
Heat a pan, add cooking oil, and grill the chicken tenderloins until golden brown.
In a bowl, mix together the seasoned chicken sauce (gochujang, ketchup, soy sauce, sugar, minced garlic, etc.).
Add the sauce to the grilled chicken tenderloins and toss until evenly coated.
Cook over low heat for a short time until the sauce is slightly reduced.
Transfer to a plate and sprinkle sesame seeds on top to finish.