Pre-heat the oven to 375. Bake the potatoes until soft (30-50 minutes, depending on the size). Slowly heat the oil. Remove from the heat and add the garlic. Allow to steep at least 10 minutes. Place the potato on a cutting board. Cover with a clean towel. Using a meat tenderizing mallet carefully punch the potato. Use a spatula to transfer to a plate. Pour the garlic oil and vinegar (if used) over the potato. Check the seasoning.
NOTES :This recipe from the Mediterranean could almost be described as a cross between a baked and smashed potato.