How to Make It
Heat the oven to 350°. Put the bread cubes on a baking sheet and toss them with the oil and 1/4 teaspoon each of the salt and pepper. Bake, stirring occasionally, until the croutons are crisp and starting to brown, 5 to 10 minutes.
In a small bowl, whisk together the mayonnaise, ketchup, Worcestershire sauce, 1/4 teaspoon of the salt, and the remaining 1/4 teaspoon pepper. Add the pickle relish, the egg, and the scallion bulbs and stir to combine.
In a large bowl, toss together the lettuces, scallion tops, and corned beef. Serve topped with the dressing and the croutons.
• Instead of the corned beef, add strips of deli pastrami, ham, or turkey.
• Use romaine instead of iceberg lettuce.