The tastiest grilled-cheese sandwiches aren't prepared in the kitchen in a frying pan. They're made on a grill.
Grilled Cheese How-To
Preheat grill or grill pan until hot. Cook several strips of bacon in an oven. Slice bread, cheese (we made ours with New York cheddar), and tomatoes -- the juiciest ones of the season. Lightly butter one side of each of two pieces of bread.
Lay bread slices, buttered sides down, on a plate. Top both with cheese, and add tomatoes to one. Place bread on the grill, buttered side down; cover. Grill until the cheese has melted, about two minutes. Remove sandwich halves from grill. Add the bacon. Season with salt and pepper. Put the sandwich halves together, and serve.