Before grilling the kebabs, soak the skewers in water for 30 minutes and cut all the ingredients into 1-inch cubes. You can also marinate the meat in vegetable oil, pepper and spices. Then, skewer the ingredients and grill them on a medium flame for 10-15 minutes or on a gas grill for 2.5 minutes on each side. When you think they’re done, bite into the meat to make sure it’s tender and doesn’t have reddish juices. Scroll down to learn how to achieve medium heat on a charcoal grill.