Preheat your skillet over medium heat and add the butter, letting it melt and shimmer.
Lay the slices of bologna flat in the skillet, ensuring they don’t overlap. Cook for about 2–3 minutes until the edges start to curl and turn crispy golden brown, and the meat sizzles loudly.
Carefully flip the bologna slices with a spatula and cook for another 2 minutes until both sides are deeply golden and crackling, filling the kitchen with a savory aroma.
During the last minute of frying, place a slice of cheese over the bologna and cover the pan with a lid or foil to help it melt into gooey goodness.
Meanwhile, lightly toast your bread in a toaster or in a separate pan until golden and firm, providing a sturdy base for the juicy, crispy filling.
Assemble the sandwich by placing the toasted bun on a plate, then layering the crispy bologna slices with melted cheese on top. Add any extras like mustard or hot sauce if desired.
If you like, press the assembled sandwich briefly in the pan for a minute to crisp the bread further and meld the flavors together.
Let the sandwich sit for a minute to settle, then slice in half if you prefer. Enjoy the crispy, savory, and nostalgic flavors of this simple comfort food.