Grate the garlic, ginger and onion into a 1 gallon zip-top bag.

Add the gochujang, pineapple, soy sauce, sesame oil, brown sugar, sesame seeds and pepper to the same bag.

Mix well.

Reserve 1/4 cup of the marinade for a condiment when serving the meat. Make sure to reserve the marinade before adding the chicken to the bag.

Thinly slice the chicken and add it to the bag. Make sure to marinate the chicken for at least 2 hours.

Preheat your grill to high heat. Add a vegetable grill pan to the grill. This will prevent the thinly sliced chicken from falling through the grates.

Cook the meat until the chicken is opaque and the edges start to caramelize.

Remove and serve over rice or in lettuce cups with your favorite Kimchi.