Fill a pot with water, season it liberally with salt, then bring it to a boil over high heat.
Reduce the heat to medium, remove the casing of the hot dog (if artificial), then dip it in the boiling water and let it simmer for 5 minutes. Turn off the heat and keep the frank in the pot when done.
Whip out a frying pan, add a glug of oil and unsalted butter, then set the burner on medium-high. Wait for the butter to melt and stop bubbling, then add the frank to the pan and sizzle on all sides until golden brown.
Prepare the hot dog
Slice the hot dog bun semi-open. Scoop up some of the hot oil and melted butter from the pan with a tablespoon and spread it on the inside of the bun.
Lay the sliced cheddar cheese on the inside of the bun to create a cheese cushion between the bread and the frank. Put the steaming frank on top of the cheese cushion.
Put the hot dog in a 400°F (200°C) oven, or on the grill with the lid closed, for 2-3 minutes to further melt the cheddar cheese.
Top with condiments
Top with sweet chili sauce and then a generous amount of sliced pickled jalapeño peppers. Rest for 2-3 minutes before serving and eating.
Keyword cheddar hot dog, hot dog, jalapeño hot dog, spicy hot dog, sweet chili hot dog