In a bowl, combine the ground beef, panko crumbs and seasonings.
Starting with a rounded end of one potato, alternate approximately 1 ounce of ground meat mixture with a slice of potato until you have add the whole potato to the skewer. You want to be sure to press it down to spread out the ground meat to the edges of the potatoes. Repeat with remaining skewers. Then spray all sides with cooking oil spray.
Place skewers on grill and cook for 15 minutes on each side. Use a meat thermometer to check that the center has reached at least 165degF (make sure you do not touch the skewer with the probe).
Brush each skewer with bbq sauce. Cook for another 5 minutes then rotate and brush with bbq sauce. Cook another 5 minutes.
Remove from grill and then remove each kebab from the skewer to serve.