Ingredients
Equipment
Method
Bake the potatoes
- Heat the oven to 425°F.
- Line a rimmed baking sheet with foil.
- Scrub and dry the potatoes.
- Prick each potato several times with a fork.
- Rub the potatoes with the oil and kosher salt.
- Bake the potatoes on the prepared sheet for 50 to 65 minutes, until the skins are crisp and a knife slides easily into the centers.
Cook the onions
- Melt the butter in a 10-inch skillet over medium-low heat.
- Add the onion and cook for 20 to 25 minutes, stirring often, until soft and deeply golden.
Make the spread
- Stir the mayonnaise, ketchup, relish, vinegar, and sugar together in a small bowl until smooth.
Assemble the potatoes
- Split each hot potato lengthwise.
- Fluff the insides with a fork.
- Place a slice of cheese inside each potato and let it soften for 1 minute.
- Divide the grilled onions, spread, and chopped pickles among the potatoes.
- Serve hot.
Notes
For crisp skins, dry the potatoes thoroughly before rubbing them with oil and salt. Refrigerate leftovers for up to 3 days; freezing is not recommended. For a dairy-free version, use dairy-free butter and cheese.
