The perfect grilled cheese sandwich all starts with, of course, the cheese. Instead of going just for American, use what I like to call the "trinity of cheese": provolone, American and sharp cheddar. I start with mustard, spreading it crust-to-crust (it's a must!), layering the cheese (American in the middle!), ribboning the ham to create height, and spreading the outside of the bread with mayo to create that golden crust.
Preheat a pan or griddle over medium heat. Spread each bread slice with mustard — crust to crust is a must to get full coverage so that each bite is identical.2.
Use a trio of cheeses in a grilled cheese to achieve perfect harmony: 1 slice of American cheese for gooeyness, 1 slice of aged cheddar for sharpness and 1 slice of provolone or mozzarella for stringiness.3.
Ribbon your meat onto your sandwich to create dramatic height and a smoother bite down. Don't just lay the meat flat — it makes for a flat sandwich.4.
Add anything else you'd like to the sandwich — I like pickled jalapeños, but you could also add some tomatoes (just make sure you season them with a bit of salt and pepper!).5.
Spread mayo on the outside of a grilled cheese before it goes into the pan or onto the griddle, which ensures it will be perfectly golden brown every time.6.
Place on the griddle; dome your grilled cheese with a metal bowl to create a vortex of heat and ensure the cheese melts without over-toasting the exterior, 2 to 3 minutes. Flip, cover again and cook until the cheese is melted and the sandwiches are golden brown, 2 to 3 minutes. Enjoy!