One thing cheese lovers can agree upon is that grilled cheese really is the greatest thing since, well, sliced bread. Here, we'll give you a primer on the classic grilled cheese, including our expert tips to make it perfectly melted and toasty every time, as well as three ways to upgrade your grilled cheese — sweet, salty, and spicy! — depending on your mood. Take a look, then share your favorite grilled-cheese-sandwich combo with us in the comments. On Brandi: Edward Avedis.