Step 1

For the Chicago dog sauce: Whisk together the mustard, relish, celery seed, peppers and tomato and set aside.

Step 2

For the grilled cheese: Heat a flat, nonstick griddle to medium heat. Add the hot dogs, flat-side down, and griddle until golden brown. Set aside.

Step 3

Meanwhile, build your grilled cheese. One slice of bread, place 1 slice American, 1 slice provolone, two butterflied and griddled hot dogs, 1 slice American and 1 slice provolone. Close and butter both sides of the bread; crust-to-crust is a must.

Step 4

Place on a nonstick skillet set to medium heat, and cover. Griddle until golden brown and the center starts to get gooey. Flip, cover, and continue to griddle until the cheese is fully melted and the exterior is golden brown.

Step 5

Cut and serve with a side of the Chicago dog sauce. Repeat to make more sandwiches.