Heat a dry large skillet, preferably cast iron, over medium-high. Working in batches, arrange bologna slices in a single layer in skillet and cook until browned all over and crisp, about 2 minutes per side. Transfer to a plate as they are done. Save skillet with any fat.

To build sandwiches, Divide bologna between 2 slices and top with pickles and slaw. Close up sandwiches and cut in half.