- 2 large hard-boiled eggs, peeled and finely chopped
- 2 tablespoons, plus 1½ teaspoons, Kewpie mayonnaise
- 1 tablespoon Dijon mustard
- 3 cornichons, finely chopped
- ¼ teaspoon freshly ground black pepper
- 2 boneless, ½-inch-thick pork chops
- Kosher salt, to taste
- 2 tablespoons all-purpose flour
- 1 large egg
- 1 cup panko (Japanese bread crumbs)
- Canola oil, for frying
- 2 tablespoons tonkatsu sauce, plus more to taste
- 4 slices white sandwich bread, crusts removed
- Make the egg salad: In a medium bowl, stir together the eggs, Kewpie mayonnaise, Dijon mustard and cornichons. Season with the pepper and set aside. Makes 1 cup of egg salad and can be refrigerated up to 2 days in advance.
- Make the katsu sando: Using a mallet, pound the pork chops between 2 pieces of plastic wrap to a ¼-inch thickness. Season the pork chops with salt and sprinkle with the flour.
- In a shallow bowl, beat the egg. Place the panko in another shallow bowl. One cutlet at a time, dip the pork into the egg mixture, letting the excess drip back into bowl, then coat the cutlet in panko, shaking off any excess.
- Pour enough oil into a large skillet until it reaches a depth of ¼ inch and place over medium-high heat. When the oil begins to ripple, add the pork cutlets and fry until golden brown and cooked through, 2 minutes per side. Transfer to a paper towel-lined plate to drain and season lightly with salt while still hot.
- Squeeze the tonkatsu sauce onto one side of each slice of bread. Sandwich each pork cutlet in between two slices of bread and cut in half. Serve cut-side upright with the egg salad on the side.