Toast your bread with bread toaster, spread it with mayonnaise. (If you want to have a nice brown color of your bread, spread it with butter, and toast it over your pan, but you need to reheat it once along with the filling carefully, before you serve it for a crunchy texture, or.... just spread it with butter, sprinkle with a lil bit of dried parsley, and just toast it with your toaster. Done. ).