2. After that, we need to mix the seasonings prepared before with the vegetable oil. After mixing well, we can put the chicken leg meat, green pepper slices, red pepper slices and onion slices together. After mixing well, we need to marinate for at least two or three hours to make the roast chicken skewers completely tasty. For the chicken pieces that have been marinated and savored, we can string together green pepper slices, red pepper slices and onion slices. The worn chicken kebabs need to be coated with oil, and then directly put on charcoal fire to start roasting. You need to pay attention when roasting, and you must keep turning it over until the chicken is cooked. Moreover, it should be noted that the barbecue time should not be too long and the heat should not be too large to avoid burning.