01 -
Place the fries onto a baking sheet and cook them according to the package instructions.
02 -
In a medium-sized bowl, whisk together mayonnaise, ketchup, mustard, sweet relish, white vinegar, salt, and pepper. Refrigerate for a few minutes to blend the flavors.
03 -
Melt butter in a medium skillet over medium-high heat. Add diced onions, season with salt and pepper, and cook for about 10 minutes until golden brown.
04 -
Once the fries are cooked, turn off the oven and place slices of American cheese side by side to cover the fries. Place back in the warm oven for about 5 minutes or until the cheese is melted.
05 -
Sprinkle the caramelized onions over the melted cheese fries.
06 -
Remove the animal style sauce from the refrigerator, drizzle it over the fries, and enjoy.