1. In a pan over medium heat, heat the pan, and then add the oil and onion slices; stir until they wilt.
2. Add the hot dog slices to the onions and sauté-fry them together for 3 minutes. Add the ketchup, mustard, and garlic, and stir them together for a couple of minutes, then take the pan off the heat.
3. Stuff the hot dog mix in your favorite type of bread and wrap it in form of a roll.