Wash the potatoes and cook them in a saucepan. Not too soft or they will fall apart.
In a freezer bag, add oil, salt, pepper, finely chopped garlic and chopped chilli pepper. Drain the potatoes and prick each potato several times with a fork. Now put the hot potatoes in the freezer bag and add a sprig of rosemary. Close the bag tightly and turn it back and forth several times so that the potatoes have all come into contact with the oil-spice mixture. Now let the potatoes cool down, turning them every now and then. Then stick the potatoes on a skewer (always 3 on one). Reheat the potatoes on the grill.
Tastes great with a freshly grilled steak. We always eat sour cream with it - dip.